Transpiration Cooling Experiment for Scramjet Engine Combustion Chamber by High Heat Fluxes

2006 ◽  
Vol 22 (1) ◽  
pp. 96-102 ◽  
Author(s):  
Kyo D. Song ◽  
Sang H. Choi ◽  
Stephen J. Scotti
Keyword(s):  
Combustion Chamber ◽  
High Heat ◽  
Heat Fluxes ◽  
Transpiration Cooling ◽  
Engine Combustion ◽  
Scramjet Engine

Numerical simulation of fuel ignition the scramjet engine combustion chamber

2021 ◽  
Vol 13 (4) ◽  
pp. 148-154
Author(s):  
Alexander Molchanov ◽  
Dmitry Gribinenko ◽  
Dmitry Yanyshev
Keyword(s):  
Numerical Simulation ◽  
Combustion Chamber ◽  
Engine Combustion ◽  
Scramjet Engine

Multidimensional Modeling of Temperature Distribution in Engine Combustion Chamber

2011 ◽  
Author(s):  
Yuanhong Li ◽  
Song-Charng Kong
Keyword(s):  
Heat Conduction ◽  
Combustion Chamber ◽  
Thermal Stresses ◽  
Combustion Process ◽  
Numerical Procedure ◽  
Heat Fluxes ◽  
Operating Conditions ◽  
Uniform Temperature ◽  
Temperature Distributions ◽  
Engine Combustion

Heat conduction calculations are coupled with in-cylinder combustion modeling for engine simulation in this study. Heat transfer on the fluid-solid interface will affect the in-cylinder combustion process, emissions formation, and thermal loading on the combustion chamber surface. Full knowledge of heat fluxes on the interface is important in helping improve engine efficiency, reduce exhaust emissions, and reduce combustion chamber thermal stresses. To account for the unsteady, non-uniform temperature distributions on the combustion chamber surface, a fully coupled numerical procedure was developed and applied to calculate in-cylinder flows and heat conduction in solids simultaneously. The current approach was first validated against analytical heat conduction solutions. The model was then applied to simulate diesel engine combustion under different operating conditions. Unsteady, non-uniform temperature distributions on the piston surface were successfully predicted. Global engine parameters including in-cylinder pressure, heat release rate, and emissions were also comparable to the experimental data.

Design and analysis of an inlet and combustion chamber of scramjet engine

2020 ◽  
Author(s):  
Karthikeyan Paramasivam ◽  
Anderson Arul Gnana Dhas ◽  
Nivin Joy ◽  
Kanimozhi Balakrishnan ◽  
Vedagiri Sri Harsha ◽  
...  
Keyword(s):  
Combustion Chamber ◽  
Scramjet Engine

Experimental and Analytical Investigation of Compact Liquid Cooled Heat Sinks

2004 ◽  
Author(s):  
M. Zugic ◽  
J. R. Culham ◽  
P. Teertstra ◽  
Y. Muzychka ◽  
K. Horne ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Experimental Tests ◽  
Reynolds Numbers ◽  
High Heat ◽  
Analytical Investigation ◽  
Boundary Resistance ◽  
Heat Fluxes ◽  
Heat Sinks ◽  
Air Cooling ◽  
Design Tools

Compact, liquid cooled heat sinks are used in applications where high heat fluxes and boundary resistance preclude the use of more traditional air cooling techniques. Four different liquid cooled heat sink designs, whose core geometry is formed by overlapped ribbed plates, are examined. The objective of this analysis is to develop models that can be used as design tools for the prediction of overall heat transfer and pressure drop of heat sinks. Models are validated for Reynolds numbers between 300 and 5000 using experimental tests. The agreement between the experiments and the models ranges from 2.35% to 15.3% RMS.

An Integral Heat Sink for Cooling Microelectronic Components

1993 ◽  
Vol 115 (3) ◽  
pp. 284-291 ◽  
Author(s):  
S. H. Bhavnani ◽  
C.-P. Tsai ◽  
R. C. Jaeger ◽  
D. L. Eison
Keyword(s):  
Heat Sink ◽  
Silicon Surface ◽  
Numerical Study ◽  
High Heat ◽  
Heat Fluxes ◽  
Silicon Surfaces ◽  
Source Surface ◽  
Mouth Size ◽  
Severe Constraint ◽  
Boiling Incipience

Liquid immersion cooling is rapidly becoming the mechanism of choice for the newest generation of supercomputers. Miniaturization at both the chip and module level places a severe constraint on the size of the heat sink employed to dissipate the high heat fluxes generated. A study was conducted to develop a surface that could augment boiling heat transfer from silicon surfaces under these constraints. The surface created consists of reversed pyramidal features etched directly on to the silicon surface. Experiments were conducted in a saturated pool of refrigerant-113 at atmospheric pressure. The inexpensive crystallographic etching techniques used to create the enhanced features are described in the paper. The main characteristics of interest in the present study were the incipient boiling superheat and the magnitude of the temperature overshoot at boiling incipience. Results were obtained for test sections with various cavity densities, and compared with data for the smooth untreated surface. It was found that incipient boiling superheat was reduced from a range of 27.0–53.0° C for the untreated silicon surface, to a range of 2.5–15.0° C for the enhanced surfaces. The overshoot also decreased considerably; from about 12.0–18.0° C for two classes of untreated surfaces, to a range of 1.5–5.3° C for the enhanced surfaces. The values of the incipient boiling superheat, and those of the overshoot decreased with a decrease in cavity mouth size. Two ratios of heat source surface area to the area of the enhanced surface were studied. The overshoot values obtained for these surfaces were compared with those observed for some commonly used enhanced surfaces. An elementary numerical study was conducted to estimate the magnitude of heat spreading.

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