Facilities

PCMEC has established an articulated, planned policy for the creation and modernization of laboratories by gathering resources associated with research projects approved by the Sectorial Funds in the area of Gas-Petroil and Energy (CT-Petro, CT-ENERG) linked to Eletronorte, CTEEP, CELG, Petrobrás, FINEP, CNPq, and CAPES. The research groups integrating the program have acted in the scope of this policy of gathering resources, thus accounting for adequate physical facilities and well-equipped laboratories, which has guaranteed uniformity and good functioning of the activities of education and research in the context of the program. We also have an updated library of computing resources accessible to professors and students connected to the Internet counting with access conditions to sources of multimedia information, such as the CAPES gate of journals, in addition to a proper administrative support. These combined factors generate an essential infrastructure for the development of research activities of experimental, theoretical, and computer nature, fundamental to the areas of Mechanics of Fluids, Mechanics of Solids, Thermal Engineering, Vibrations Mechanics, and Dynamics of Systems.

Research line: Fatigue, Fracture, and Materials

Laboratory of Mechanical Tests

The goal of this laboratory is to investigate behavior in fatigue and fracture of mechanical materials and components of interest to the engineering field. The laboratory has an infrastructure similar to the best research institutes worldwide in the area. We carry out varied types of mechanical tests, including high complexity testing in the field of fatigue (even in a global scenario), such as tests involving contact in wires of energy power cables, fatigue by fretting with multiple agents and axial-torsional fatigue tests, both also including high temperature.

Equipment

  • 2 axial-torsional machines MTS 809 with capacity of 100 kN/1100 N·m;
  • 2 axial machines MTS 810 with capacity of 100 kN;
  • 1 axial machine MTS Landmark 370 equipped with load cell of 5kN;
  • 1 machine of test of fatigue by fretting with 4 agents able to apply independently a fatigue strength of up to 250 kN, a tangential strength of up to 100 kN, and a regular strength of up to 15 kN;
  • 1 machine of test of fatigue by fretting in wires of energy power cables with capacity to apply independently a fatigue strength of up to 25 kN, a tangential strength of up to 15 kN, and a regular strength of up to 5 kN;
  • 1 machine with capacity of 100 kN equipped with a device for fatigue testing in currents under out-of-plane bending;
  • Furnace model 653 for axial-torsional testing at high temperature (up to 1400 °C),
  • Heating system for tests of fatigue by fretting at high temperature (up to 850 °C).

Expertise to conduct the following tests:

  • Tensile testing
  • Fatigue testing under detraining control (e-N curve)
  • Fatigue testing under voltage control (S-N curve)
  • Propagation testing of crack by fatigue (da/dN x ΔK curve)
  • Test of tenacity to fracture
  • Test of fatigue by fretting
  • High temperature testing

Laboratory of Fatigue and Structural Integrity of Energy Power Cables

The main goal of this laboratory is to develop researches in the area of fatigue and dynamic characterization of energy power cables. The laboratory counts with a solid financing from companies of the sector of energy transmission and distribution. The infrastructure of this laboratory is constituted of three 60 m gaps with a sophisticated control and monitoring system that enables to perform tests of fatigue and self-damping with a high level of accuracy. It represents the only laboratory in the Southern Hemisphere, and perhaps the best instrumented one worldwide. The laboratory has the capacity to perform tests not only at high temperatures, but also using different types of cables and clamps of suspension. The work of this laboratory occurs jointly with numerical simulations of a high complexity level involving the cable-clamp coupling and carried out at workstations of last generation.

Laboratory of Screening Electronic and Confocal Laser Microscopy

This laboratory is equipped with a scanning electron microscope JEOL JSM 6610 with an acceleration voltage of 30 KV, resolution of 3nm, up to 300.000 X amplification with a system of microanalysis of X-rays EDS.

The laboratory also counts with a laser confocal microscopy OLIMPUS LEXT OLS 4000 to generate 3D images and micro-geometric measures. It is based on the principle that out-of-focus information can be rejected upon the presence of apertures of micro-metric dimensions in front of the detector. The scanning laser microscopy allows to the detection required for the confocal image. It is possible to perform the scanning of the sample at several x-y planes at different heights. The order of the planes obtained enables to rebuild tridimensional images of the object.

Laboratory of Material and Metallurgy

The laboratory of material and metallurgy occupies an area of approximately 100 m2. It is composed of a metallographic preparation room, optical microscope, universal durometer, microdurometer, pendulum impact, and furnaces of thermal treatments up to 1100 °C and sintering of up to 1700 °C, with high vacuum.

The laboratory also counts with equipment for microabrasion tests. Abrasive wear has been investigated through a machine of microabrasive wear. The contact among a sphere that moves in rotation, an abrasive suspension liquid, and a specimen generates spherical hubcaps (wear craters). Both contact and movement related to these elements produce a tangential friction strength. This configuration also enables to control the rotation of the sphere in the test, the sliding distance between the sphere and the specimen, the concentration of slurry, which is introduced in the specimen/sphere contact, and its flow. The analysis of these craters allows to estimate the behavior regarding the abrasive wear of a material in actual operational conditions.

Laboratory of Biomass Technologies

The goal of this laboratory is to provide researches with support regarding transformation, characterization, treatment, and applications of plant biomass to develop new materials and fuels. Material derived from renewable sources can originate biodegradable polymers, reinforced composites with natural fibers and renewable fuels.

The laboratory counts with the following two environments: one of 15 m2 with equipment of instrumental analysis for thermal and chemical characterizations, and another of 30 m2 for the performance of all activities related to the treatment of plant biomass and preparation of polymers, composites, and biofuels. The laboratory is equipped with simultaneous thermal analyzer (TGA, DTA, and DSC), Fourier transform infrared spectroscopy, Gas Chromatography, heating mantle, ultrasonic bath, water bath, pHmeter, casting plates, centrifuge, rotaevaporator, muffle furnace, oven, basic laboratorial glassware and other more particular, such as Sohxlet extractor and viscometer.

Research line: Energy and environment

Laboratory of Thermal and Combustion Machines

This laboratory accounts for two dynamometers with full instrumentation for engine tests of up to 300 cv. Traditionally, its work involves engines testing operating with Otto and Diesel cycles fed with liquid and gas fuel (gasoline, diesel oil, alcohol, and gas). Currently, this laboratory is investing in works of two other approaches: test of engines fed with gases derived from gasifiers and biodiesel. This laboratory also has two workbenches of gas micro- turbines gas to operate under different fuels, and the study of combustion process. One of the sets is a turbo-compressor with a combustion chamber equipped with a swiller generation system. The second workbench counts with a type Lean Premixed transparent combustion chamber and a Pressurized Combustor. This unity has adjustable-blades swillers to enable to control the intensity of vorticity in the combustion chamber. 

Laboratory of Heat Transference

The laboratory of heat transference counts with different equipment and sensors to carry out applied, fundamental research in the scope of heat transference, such as systems of temperature and pressure data generation, a thermal chamber, thermal baths, heatmeters, adjustable sources of voltage and current, varied sets of pressure and temperature sensors, measurers of flow in liquids and gases, diverse glassware, among others. In this laboratory, we develop experiments regarding natural convection, mixed convection, and thermal accumulation in BioPCM’s. In addition, its structure supports other facilities in the LEA, such as the assembling of probes of hot-wire anemometry.

Platform of Testing for Hydrokinetic Devices Models (Wind Tunnel)

LEA accounts for a platform of experimental testing of Wind Tunnel to carry out researches on models of free turbines of horizontal axis, isolated or as a set, and support other experiments, such as those involving mixed and reinforced convection. The section of testing has dimensions of 1.2 m in height, 1.2 m in width, and 2 m in length. The fan is located at the exit of the tunnel and triggered by an electric engine model of 10 HP, aspiring air from the entry of the tunnel to its exit at a controlled speed through an inversion of 10A 3CV. The reduction factor from the nozzle area to the testing section is 3,4:1,2. The speed of the air flow inside the tunnel may vary between 0 and 20 m/s. The intensity of turbulence is around 1% and limit layer inside the testing section, in which the turbine is positioned, is 8 x10-3 m. The tunnel counts with instrumentation and resources of pictometry to verify the average speed of flow reference, a system of configurable tridimensional probe displacer and anemometry to measure instant speed, a system of flow visualization with chambers of high speed capture associated with a generator of particles and dynamometers in the models of turbine with automatic triggering.

Laboratory of Solar Energy

This laboratory aims at establishing relations between solar resource and the technologies of conversion available through measures of solar resource, experimental prototypes, and modeling of conversion system.

The laboratory accounts for a full solarimetric station installed in Block G at the School of Technology with independent measure from the three components of solar irradiance: horizontal global irradiance, direct normal irradiance, and diffuse irradiance. It is a station that counts with instrumentation by the company Kipp & Zonnen equipped with a solar SOLYS 2 tracker with sphere shading. Two pyranometers model Kipp & Zonnen CMP6 (class B ISO-9060) are installed – one to measure global irradiance and another for diffuse irradiance. A pyrheliometer model Kipp & Zonnen CHP1 (class B ISO-9060) measures the direct normal irradiance. The data are collected using a datalogger Campbell Scientific CR1000 connected directly to a computer in which the data are stored. In addition to a solarimetric station, the laboratory also accounts for a full weather station to generate auxiliary environmental data to determine the solar resource available. Additionally, a chamber of sky images is installed to capture the presence of clouds, as well as their formation and movement for studies of short-term solar forecast.
In addition to the component of resources measure, prototypes of systems of solar energy use are oriented to validate models of numerical simulation also developed in the laboratory. 

Platform Measure for Biosphere Flows – Atmosphere

The platform to measure the flows between biosphere and atmosphere is installed at the Água Limpa (FAL) Farm of the University of Brasília, located in the Vargem Bonita Rural Center, Federal District. This platform is constituted of two flow towers, one in the native Cerrado and another in a cultivation of Eucalyptus specifically designed for this purpose. The flow towers are equipped with flow measure systems for sensible and latent heat (evapotranspiration) and carbon dioxide flow through the vortices correlation method. Most of the main instruments were manufactured by Campbell Scientific and consist of a tridimensional sonic anemometer and a gas analyzer of fast response to measure the concentration of CO2 and water vapor. In addition to these instruments, auxiliary measures are also performed, including temperature and relative air humidity, liquid radiation exchanges (solar and thermal radiation) between vegetation and atmosphere, heat flow to the soil, moisture profile, and soil temperature. The measures are replicated in both the towers in order to reach a better understanding on the dynamics of mass and energy exchanges between vegetation and atmosphere, thus establishing possible meteorological/climate consequences resulting from alterations in land use with the displacement of native vegetation by other cultures, either to generate energy or produce food. These studies can support the elaboration of public policies to enable land use of lower environmental impact. 

Laboratory of Computational Science

The laboratory of Computational Science is oriented to conduct researches on the Dynamics of Computational Fluids, known as CFD (abbreviation for Computational Fluid Dynamics), in wind turbines and hydrokinetics. This set of numerical methodologies enable computational solutions of the prevailing equations and to provide a computational simulation regarding the flows of fluids. The computers present in the laboratory are divided in two regular computational forms enough only to write projects and simulation of simplified cases, and calculation stations to perform more complex calculations and simulations of turbines. The platforms to carry out heavier calculations named as workstations are configured each with two CPU’s Intel Xeon numbering 24 processing unities, 64 GB of memory RAM, and 16 of hard disc.

Research line: Mechanical System Dynamics

Laboratory of Vibrations

The Laboratory f Vibrations was built in 1982 and is oriented to activities of education, research, and extension. It has recently passed through a process of modernization and readjustment of its physical space with resources from the INCT of Intelligent Structures in Engineering – between 2009 and 2016 – and has continued to be updated with resources granted majorly by CNPq, FAP-DF, FINEP, and Petrobrás.

This laboratory accounts for a space for work stations for students of both undergraduate and graduate levels through an internal web of desktops and fluctuating stations. Additionally, the Laboratory of Vibrations has a varied set of accelerometers of general and specific proposals, mini-accelerometers PCB, and laser sensors of Baumer position and laser doppler vibrometer Polytec PDV-100, in addition to microphones B&K. It also counts with hammers of modal impact with different sensitivity levels, a mini hammer for light structures, and shakers LDS, B&K, as well as big, medium and small bands. The laboratory also provides a large number of systems of NI acquisition with input and output, software of signal conditioning, and operational Modal Analysis, amplifiers, and a metallurgical furnace to treat shape memory alloys. Over the past few years, the infrastructure available in the Laboratory of Vibrations has enabled the test of vibrations, modal analysis, and the characterization of mechanical waves of light structures of composite materials, metamaterial, and phonic crystals produced from additive manufacture and intelligent material, characterization of mechanical absorbers of vibration in elastic and pseudoelastic regime produced from shape memory alloys, tests to characterize energy collection in intelligent structures. The topics experimentally studied in the Laboratory of Vibrations have applications majorly in the industry of production and transmission of electrical energy, oil, as well as gas and aerospatial. The team of the Laboratory of Vibrations has produced scientifically relevant results seeking to support the generation of innovating solutions both in the industry and society.

Research line: Fluid Mechanics of Complex Flows

Laboratory of Microhidrodynamics and Rheology – LMR

Equipped with a Rheometer coupled to a magnetic cell and microscopy with chamber CCD – MCR 301 Anton Paar, containing a drop-pendant type Tensiometer TVT2, densimeter of samples of 2ml, state-of-art optical microscope with visualization and image analysis, laboratory of sample preparation with ovens, precision scales, mixers, among other accessories such as gaussmeter,  glassware,  micrometric pipettes. The rheometer MCR 301 has a set of functions for an accurate rheological characterization of a wide range of complex fluids, varying from non-Newtonian viscous fluids without memory to material with viscoelastic properties.  This laboratory develops researches in the area of complex fluids characterization (i.e. active and passive suspensions, magnetic fluids, emulsions), either at the microstructural and the rheological level. The systems tested consist in general of particulate fluids whose particles are disperse in the fluid, such as hard spheres, drops, blisters, flexible capsules, which provides the fluid with a non-linear behavior when subjected to flows like simple or parabolic shearing. The LMR contributes to the gathering of human resources, either at the undergraduate course (i.e. introduction to scientific research, final projects, experiments in the discipline Mechanics of Fluids 2) and the graduate program (master’s degree and doctorate) level. In addition, the LMR meet scientific demands as well as those of graduate students from other Departments of the University of Brasília, as Pharmacy, Chemical, Biology, and Physics.

Further information on the laboratory is available on www.vortex.unb.br.

Campus Universitário Darcy Ribeiro

Asa Norte, Brasília-DF

CEP 70.910-900

 

Secretaria PCMEC: +55 (61) 3107-5673

 

enm.pcmec@gmail.com

 

Localização

Copyright 2019 © Faculdade de Tecnologia | UnB. Todos os direitos reservados.