Tu Jianqiang, Chen Lianzhong, Xu Kao. Testing of combustor chamber material in arc jet flow mixing with transverse injected water[J]. Journal of Experiments in Fluid Mechanics, 2015, (4): 81-87. DOI: 10.11729/syltlx20140121
Citation: Tu Jianqiang, Chen Lianzhong, Xu Kao. Testing of combustor chamber material in arc jet flow mixing with transverse injected water[J]. Journal of Experiments in Fluid Mechanics, 2015, (4): 81-87. DOI: 10.11729/syltlx20140121

Testing of combustor chamber material in arc jet flow mixing with transverse injected water

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  • In the combustor inner flow thermal environment,the oxidation reaction of com-bustor inner surface thermal protection material,such as C/SiC and Ultra High Temperature Ce-ramic (UHTC),is more rapid in water vapor as a product of combustion than in oxygen.The water vapor also reacts with silica glass,formed in the combustor inner surface to prevent oxida-tion,to destroy the protective layer by volatilization.It has a serious impact on the combustor thermal protection performance.In the paper,the combustor inner flow thermal environment has been simulated by plasma arc heating supersonic rectangular Turbulent Flow Duct (TFD).At the same time,the ambient-temperature water,whose mass flow rate is 4%~5% of the flow, has been transversely injected into the mixing chamber,located at the end of the arc heater and before the nozzle,in order to mix with the high-temperature air and simulate the component, mass flow rate and temperature of water vapor coming from hydrocarbon combustion.The mix-ing quality between the water and the high-temperature air in the mixing chamber has been ana-lyzed by numerical calculation.The total enthalpy calculation method of the mixing gas has also been discussed.
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