Teaching of Extended Surface Heat Transfer Through Laboratory Experiments

2012 ◽  
Author(s):  
Valerie Eveloy ◽  
Peter Rodgers ◽  
Shrinivas Bojanampati
Keyword(s):  
Heat Transfer ◽  
Student Performance ◽  
Teaching Strategy ◽  
Test Facility ◽  
Management Skills ◽  
Performance Improvements ◽  
Numerical Predictions ◽  
Hands On ◽  
Extended Surface

This paper describes a hands-on laboratory thermofluid project which is taught as part of a one-semester, junior-level mechanical engineering course titled Core Measurements Laboratory. The experiment focuses on the characterization of multi-mode heat transfer from a range of cartridge-heated fin geometries cooled by conduction, natural convection and radiation. The project involves the design and construction of the test facility, experimental characterization of fin heat transfer, and comparison of experimental results with corresponding analytical and numerical predictions, with a formal report submitted on completion. The project is undertaken by a team of four students over a five-week period. Emphasis is placed on highlighting potential discrepancies between measurement and predictions, which are inherent in the test configurations considered, reflecting realistic engineering situations. Sample measurement and analysis results are reported in this paper. The teaching strategy employed to integrate fundamental theories with hands-on experiences is described. The effectiveness of the laboratory project in enhancing student learning of heat transfer, engineering analysis of discrepancies between predictions and measurements, and project management skills was demonstrated by monitoring student performance improvements over the duration of the project.

Teaching of Multimode Heat Transfer Through Laboratory Experiments

2010 ◽  
Author(s):  
Peter Rodgers ◽  
Shrinivas Bojanampati ◽  
Valerie Eveloy ◽  
Afshin Goharzadeh ◽  
Arman Molki
Keyword(s):  
Heat Transfer ◽  
Student Performance ◽  
Mechanical Engineering ◽  
Engineering Students ◽  
Teaching Strategy ◽  
Real Life ◽  
Vital Role ◽  
Test Facility ◽  
Test Configuration ◽  
Hands On

Hands-on laboratory skills play a vital role in providing mechanical engineering students with a sound understanding of the scientific fundamentals and their application in solving real-life engineering problems. This paper describes a hands-on laboratory thermofluid project which is taught as part of a one-semester, junior-level mechanical engineering course titled Core Measurements Laboratory. The experiment focuses on characterization of heat transfer from a cartridge-heated, isothermal cylinder inside a circular enclosure, by conduction, natural convection and radiation. The project consists in the design and fabrication of the test facility, data acquisition and comparison of experimental results with analytical predictions, with a formal report submitted on completion. The project is undertaken by a team of four students over a five-week period. Emphasis is placed on highlighting potential discrepancies between measurement and analytical predictions, which are inherent in the test configuration considered, reflecting realistic engineering situations. Sample measurement and analysis results are reported. The teaching strategy employed to integrate fundamental theories with hands-on experiences is described. The effectiveness of the laboratory project in enhancing student learning of heat transfer, engineering analysis of discrepancies between predictions and measurements, and project management skills was demonstrated by monitoring student performance improvements over the duration of the project.

Teaching Stress Transformation Through Laboratory Experiments

2013 ◽  
Author(s):  
O. Aluko
Keyword(s):  
Student Performance ◽  
Solid Mechanics ◽  
Teaching Strategy ◽  
Independent Study ◽  
Test Facility ◽  
Normal Strain ◽  
Stress Strain ◽  
Principal Coordinates ◽  
Strain Transformation ◽  
Hands On

This paper describes a hands-on laboratory solid mechanics project which was supervised as an independent study. The experimental study and analysis were focused on strain and stress transformation on cantilever beam subjected to bending within elastic range. A combination of five different metals and two types strain rosette arrangements were used in the experimentation. The project involves the design and construction of test facility and experimental analysis of tested piece. The samples of measured data and analysis are reported in this paper. The strains in rectangular and principal coordinates which were computed from measured strains enabled the stress in both coordinates to be determined. This analysis enables the students to determine experimentally, that the sum of normal strain and stresses are invariant. The teaching strategy employed to integrate fundamental theories with hands-on experiences is described. The effectiveness of the laboratory project in enhancing student learning of stress-strain transformation and project management skill was demonstrated by monitoring student performance improvements over the duration of the project. The success of this project leads to an experiment for teaching students stress-strain transformation in mechanics of materials laboratory.

Characterization of Porous Carbon Foam as a Material for Compact Recuperators

2006 ◽  
Author(s):  
A. G. Straatman ◽  
N. C. Gallego ◽  
Q. Yu ◽  
B. E. Thompson
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Porous Carbon ◽  
Aluminum Foam ◽  
Carbon Foam ◽  
Small Scale ◽  
Base Temperature ◽  
Extended Surface ◽  
Surface Convection

Experiments are presented to quantify the convective heat transfer and the hydrodynamic loss that is obtained by forcing water through blocks of porous carbon foam (PCF) heated from one side. The experiments were conducted in a small-scale water tunnel instrumented to measure the pressure drop and the temperature rise of the water passing through the blocks and the base temperature and heat flux into the foam block. In comparison to similar porosity aluminum foam, the present results indicate that the pressure drop across the porous carbon foam is higher due to the large hydrodynamic loss associated with the cell windows connecting the pores, but the heat transfer performance suggests that there may be a significant advantage to using PCF over aluminum foam for extended surface convection elements in recuperators and electronic cooling devices.

Aerothermal Measurements and Predictions of an Intermediate Turbine Duct Turning Vane

2015 ◽  
Author(s):  
Martin Johansson ◽  
Jonathan Mårtensson ◽  
Hans Abrahamsson ◽  
Thomas Povey ◽  
Kam Chana
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
High Speed ◽  
Test Facility ◽  
Spanwise Direction ◽  
Tip Leakage Flow ◽  
Current Configuration ◽  
Speed Test ◽  
Intermediate Turbine Duct ◽  
Numerical Predictions

Flow in a turbine duct is highly complex, influenced by the upstream turbine stage flow structures, including tip leakage flow and non-uniformities originating from the upstream HPT vane and rotor. The complexity of the flow makes the prediction using numerical methods difficult, hence there exists a need for experimental validation. This paper presents experimental data including both aerodynamic and heat transfer measurements within an intermediate turbine duct. These have been conducted in the Oxford Turbine Research Facility, a short duration high speed test facility enabling the use of an engine sized turbine, operating at the correct non-dimensional parameters relevant for aerodynamic and heat transfer measurements. The current configuration consists of a HPT stage and a downstream duct including a turning vane, for use in a counter rotating turbine configuration. With a stator-to-stator vane count of 32-to-24, instrumentation was installed on three adjacent intermediate turbine duct vanes and endwalls to investigate its influence. Flow phenomena such as trailing edge wakes and vortex structures from the upstream HPT vane travels through the rotor and forms an inlet condition to the intermediate turbine duct with tangential variations. Time-averaged experimental data show this effect to be distinguishable although varying in the spanwise direction. Comparisons with results from numerical predictions are included to further analyse the flow through the 1.5 stage.

scholarly journals Design, Flow Field and Heat Transfer Characterization of the Conjugate Aero-Thermal Test Facility at NETL

2021 ◽  
Author(s):  
Sridharan Ramesh ◽  
Edward Robey ◽  
Seth Lawson ◽  
Douglas Straub ◽  
James Black
Keyword(s):  
Heat Transfer ◽  
Flow Field ◽  
Design Flow ◽  
Test Facility ◽  
Thermal Test

Teaching of Beam Deflection Analysis Through Laboratory Experiments

2011 ◽  
Author(s):  
Valerie Eveloy ◽  
Shrinivas Bojanampati ◽  
Peter Rodgers
Keyword(s):  
Data Acquisition ◽  
Student Performance ◽  
Oral Presentation ◽  
Solid Mechanics ◽  
Real Life ◽  
Beam Deflection ◽  
Test Facility ◽  
Final Report ◽  
Student Survey ◽  
Hands On

Hands-on laboratory skills play a vital role in providing students with a sound understanding of the scientific fundamentals and their application in solving real-life engineering problems. This paper describes a hands-on laboratory project focused on solid mechanics, which is taught as part of a one-semester, junior-level mechanical engineering course titled Core Measurements Laboratory. The project requires students to design, construct and commission an experimental test facility for the characterization of cantilever beam deflection and stress due to pure bending using concomitant methods, consisting of three experimental techniques and analytical predictions. Beam deflection is measured using both a linear displacement transducer (LDT) and digital camera, with corresponding stress measurements derived from strain gage measurements. These measurements are compared with analytical predictions. The project is undertaken over a five-week period by a team of four students. A written project report and oral presentation are conducted on project completion. Emphasis is placed on elaboration of a test plan, sensor installation, data acquisition and LabVIEW programming, as well as analysis of discrepancies between measurements and predictions. The teaching strategy employed to integrate fundamental theory with hands-on experiences is described, with a sample of the measurement results presented. The effectiveness of the laboratory project in enhancing student fundamental and applied knowledge in the subject area, and project management skills, is assessed by monitoring student performance improvements over the duration of the project, as well as through student surveys. On a scale of 1 (deficient) to 4 (exemplary), overall class scores of 2.92, 3.25 and 3.4 were obtained for ABET Criterion 3 Outcomes (b), (d) and (g), respectively, which were assessed using the hands-on project final report and oral presentation. The student survey indicates that student knowledge in fundamentals, sensors, data acquisition and LabVIEW programming improved by 16%, 23%, 30% and 48%, respectively, with the hands on project.

Characterization of Porous Carbon Foam as a Material for Compact Recuperators

2006 ◽  
Vol 129 (2) ◽  
pp. 326-330 ◽  
Author(s):  
A. G. Straatman ◽  
N. C. Gallego ◽  
Q. Yu ◽  
B. E. Thompson
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Porous Carbon ◽  
Aluminum Foam ◽  
Carbon Foam ◽  
Small Scale ◽  
Base Temperature ◽  
Extended Surface ◽  
Surface Convection

Experiments are presented to quantify the convective heat transfer and hydrodynamic loss that is obtained by forcing water through blocks of porous carbon foam (PCF) heated from one side. The experiments were conducted in a small-scale water tunnel instrumented to measure the pressure drop and temperature rise of the water passing through the blocks and the base temperature and heat flux into the foam block. In comparison to similar porosity aluminum foam, the present results indicate that the pressure drop across the porous carbon foam is higher due to the large hydrodynamic loss associated with the cell windows connecting the pores, but the heat transfer performance suggests that there may be a significant advantage to using PCF over aluminum foam for extended surface convection elements in recuperators and electronic cooling devices.

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