Mechanism Investigations of Fluid-Solid Conjugate Heat Transfers for Vehicle Exhaust System

2012 ◽  
Vol 229-231 ◽  
pp. 419-423
Author(s):  
Guo Quan Xiao
Keyword(s):  
Heat Transfer ◽  
Exhaust System ◽  
Flow Conditions ◽  
Vehicle Exhaust ◽  
Engine Operation ◽  
Operation Conditions ◽  
Vehicle Operation ◽  
Quantitative Understanding ◽  
Heat Transfers ◽  
Transfer Study

A conjugate heat transfer study was undertaken using STAR-CD. The boundary conditions are given by vehicle operation and engine operation. All three mechanisms of heat transfer, i.e., convection, conduction, and radiation, were included in the analysis. The vehicle exhaust system components temperatures were analysized at certain several separate variables such as the velocity and temperature of the exhaust gases which depend on the engine operation conditions and the velocity and temperature of the external airflows which depend on vehicle operations. The results showed all three mechanisms of heat transfer and increased quantitative understanding of the flow conditions surrounding vehicle exhaust system.

scholarly journals Impact of Using a Filter in a Direct Gasoline Injection Engine Exhaust System on the Emitted Particle Mass and Number

2020 ◽  
Vol 50 (1) ◽  
pp. 61-76
Author(s):  
Paweł Fuć ◽  
Piotr Lijewski ◽  
Barbara Sokolnicka ◽  
Natalia Szymlet ◽  
Maciej Siedlecki ◽  
...  
Keyword(s):  
Test Bench ◽  
Exhaust System ◽  
Particle Mass ◽  
Test Results ◽  
Engine Exhaust ◽  
Engine Operation ◽  
Particulate Filters ◽  
Operation Conditions ◽  
Particulate Filtration ◽  
Made In

AbstractThe article presents emission test results comparison carried out on a dynamic engine dynamometer. Parameters were recorded during a drive made in accordance with the requirements of the RDE. Test bench allowed to determine the particle mass and number emission in the repetitive engine operation conditions. One of three used elements wan an OEM solution from one of particulate filters producers, the other was intended for use in original systems, the third was a custom product. The highest efficiency of particulate filtration was demonstrated by the last filter, which was adapted to the engine.

scholarly journals Numerical and Analytical Study of a Battery Powered Vehicle Moving in a Vacuum Tunnel

2020 ◽  
Vol 11 (1) ◽  
pp. 26
Author(s):  
Krystian Machaj ◽  
Ziemowit Malecha ◽  
Piotr Wrzecioniarz
Keyword(s):  
Heat Transfer ◽  
Power Consumption ◽  
Drag Coefficient ◽  
Analytical Model ◽  
Analytical Study ◽  
Numerical Calculations ◽  
Flow Conditions ◽  
Analytical Analysis ◽  
Insight Into ◽  
Transfer Study

The present work focuses on an aerodynamic and heat transfer study of a battery powered vehicle moving in a vacuum tunnel. The conducted research was based on analytical analysis and numerical calculations. Four different vacuum levels in the tunnel were considered—100 Pa, 1 kPa, 10 kPa and 100 kPa—and two distinct velocities of the vehicle—125 and 166 m/s—to address subsonic and supersonic conditions. It allowed defining limitations related to vacuum transportation in terms of velocity of the vehicle and a blocking ratio of the tunnel. Power consumption and drag coefficient for the considered tunnel pressures were analyzed. The cooling analysis of the batteries by passing air was performed numerically and analytically in the function of flow conditions in the tunnel. It gave some insight into main problems related to cooling of the batteries under low pressure and possible directions to solve it. It was shown that the proposed analytical model compared satisfactorily with the numerical results.

scholarly journals Flow resistance in the engine inlet-exhaust system as affected by the engine parameters

2009 ◽  
Vol 136 (1) ◽  
pp. 31-40
Author(s):  
Zbigniew ŻMUDKA ◽  
Stefan POSTRZEDNIK
Keyword(s):  
Pressure Drop ◽  
Flow Resistance ◽  
Exhaust System ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Test Results ◽  
Flow Conditions ◽  
Inlet System ◽  
Engine Operation ◽  
Fresh Charge

The paper presents theoretical and experimanetal research into the process of charge exchange in a spark ignition engine (the process of cylinder filling and discharging). A significant role in the inlet system plays the resistance of the flow of a fresh charge through the throttle, particularly when its partially opened. In classic spark ignition engine solutions this flow resistance is a part of the engine load imposition. The problem has been illustrated by the theoretical and experimental test results of the influence of the pressure drop Δpd on the side of the fresh charge flow and the pressure drop Δpw in the exhaust system on the engine operation. Relations have been determined between the engine operating parameters and the flow conditions of the charge/exhaust gases.

HEAT TRANSFER STUDY OF DRY-TYPE TRANSFORMER

2018 ◽  
Author(s):  
Rafael Mafra ◽  
Sandro Metrevelle Marcondes de Lima e Silva ◽  
Fernando Belchior
Keyword(s):  
Heat Transfer ◽  
Transfer Study

scholarly journals Experimental Determination of Stator Endwall Heat Transfer

1989 ◽  
Author(s):  
Robert J. Boyle ◽  
Louis M. Russell
Keyword(s):  
Heat Transfer ◽  
Liquid Crystal ◽  
Test Section ◽  
Electrical Power ◽  
Exhaust System ◽  
Ambient Air ◽  
Reynolds Numbers ◽  
Inlet Velocity ◽  
Turbine Vane

Local Stanton numbers were experimentally determined for the endwall surface of a turbine vane passage. A six vane linear cascade having vanes with an axial chord of 13.81 cm was used. Results were obtained for Reynolds numbers based on inlet velocity and axial chord between 73,000 and 495,000. The test section was connected to a low pressure exhaust system. Ambient air was drawn into the test section, inlet velocity was controlled up to a maximum of 59.4 m/sec. The effect of the inlet boundary layer thickness on the endwall heat transfer was determined for a range of test section flow rates. The liquid crystal measurement technique was used to measure heat transfer. Endwall heat transfer was determined by applying electrical power to a foil heater attached to the cascade endwall. The temperature at which the liquid crystal exhibited a specific color was known from a calibration test. Lines showing this specific color were isotherms, and because of uniform heat generation they were also lines of nearly constant heat transfer. Endwall static pressures were measured, along with surveys of total pressure and flow angles at the inlet and exit of the cascade.

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