Ideal Heat Release of Supersonic Combustion

2013 ◽  
Vol 29 (3) ◽  
pp. 621-627 ◽  
Author(s):  
Tao Cui ◽  
Shengbo Yang ◽  
Daren Yu
Keyword(s):  
Heat Release ◽  
Supersonic Combustion

scholarly journals Numerical Investigation of the Influence of Injection Scheme on the Ethylene Supersonic Combustion

2014 ◽  
Vol 6 ◽  
pp. 124204 ◽  
Author(s):  
Hao Ouyang ◽  
Weidong Liu ◽  
Mingbo Sun
Keyword(s):  
Heat Release ◽  
Separation Zone ◽  
Injection Pressure ◽  
Combustion Efficiency ◽  
Supersonic Combustion ◽  
Recovery Coefficient ◽  
Starting Point ◽  
Combustion Flow ◽  
Inlet Unstart ◽  
Pressure Recovery Coefficient

Ethylene supersonic combustion flow field in different injection schemes was studied numerically in the flight Mach 4. The results show that injection pressure has significant influence on the location of the separation zone and the heat release region, but the starting point of the separation region was mostly influenced by the heat release rather than by the injection pressure; the combustion efficiency of the injection schemes including two injection points is higher than that of three injection points, while the total pressure recovery coefficient of the former injection schemes is lower than the latter; excessive ethylene injected in upstream will lead to the change of free-stream flow conditions, which behaves as the inlet unstart in practical application; more ethylene could be injected in downstream to avoid the problem; on the condition of avoiding thermal choke in isolator, it is more advantageous that injection points were arranged more closely to the starting point of separation zone in upside and to the front of the cavity in downside.

scholarly journals Some Effects of Hydrogen Self-Ignition and Combustion in Supersonic Flow

2014 ◽  
Vol 16 (2-3) ◽  
pp. 245
Author(s):  
U. Zhapbasbayev ◽  
V. Zabaykin ◽  
Y. Makashev ◽  
A. Tursynbay ◽  
B. Urmashev
Keyword(s):  
Supersonic Flow ◽  
Heat Release ◽  
Chemical Reactions ◽  
Laboratory Data ◽  
Combustion Process ◽  
Supersonic Combustion ◽  
Low Flow ◽  
Diffusion Combustion ◽  
Maximum Pressure ◽  
Combustion Mode

<p>Results are presented of computational and experimental investigations of the influence of temperature and flow composition on the hydrogen combustion kinetics for a coaxial fuel supersonic flow. Depending on the flow parameters, combustion is shown to occur with an intense heat release governed by the speed of chemical reactions, or a diffusion combustion with heat release governed by mixing. The computational results are in good agreements of with laboratory data and portrays many important features of supersonic combustion. The influence of the gas temperature and composition on the diffusion combustion of a circular hydrogen jet in supersonic coaxial flow at the over expanded exhaust regimes is investigated. It is found that at low flow temperatures (Т<sub>2 </sub>~ 900 K) and in the absence of water vapors in the oxidizer gas composition, the speed of chemical reactions is the determining factor for combustion. An increase in the flow temperature (Т<sub>2</sub> &gt; 1200 K) causes a reduction of the induction time of the reactive mixture, because the mixing of fuel with oxidizer decreases, and a “sluggish” diffusion combustion of non-mixed gases is observed. The presence of water vapor and active radicals in the gas ensures the self-ignition from the start of the mixing, and the diffusion combustion mode is limited by mixing of the hydrogen jet with the coaxial flow (similar to the case with high initial temperatures of the air stream). In the case of the delay combustion process the maximum pressure level on the wall is 10% more than that in the combustion mode with ignition at the start of mixing. A sluggish combustion regime may lead to an incomplete hydrogen burnout.</p>

Dynamics of Subcooled Liquid with Pulse Heat Release in a Heater

2001 ◽  
Vol 32 (4-6) ◽  
pp. 8
Author(s):  
E. A. Tairov ◽  
B. G. Pokusaev ◽  
D. A. Kazenin ◽  
S. A. Chizhikov ◽  
L. V. Syskov
Keyword(s):  
Heat Release ◽  
Subcooled Liquid ◽  
Pulse Heat

CONTROL OF HEAT RELEASE ENERGY DURING HEATING FROM SOLID-SOLID PHASE CHANGE MATERIAL

2018 ◽  
Author(s):  
Ryohei Gotoh ◽  
Tsuyoshi Totani ◽  
Masashi Wakita ◽  
Harunori Nagata
Keyword(s):  
Phase Change ◽  
Heat Release ◽  
Phase Change Material ◽  
Solid Phase ◽  
Change Material

SURFACE HEAT RELEASE OF HTPB-BASED FUELS IN OXYGEN RICH ENVIRONMENTS

2002 ◽  
Vol 5 (1-6) ◽  
pp. 101-115 ◽  
Author(s):  
Grant A. Risha ◽  
George C. Harting ◽  
Kenneth K. Kuo ◽  
Arie Peretz ◽  
Donald E. Koch ◽  
...  
Keyword(s):  
Heat Release ◽  
Surface Heat
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