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仪器网/ 行业应用/ 解决方案/ 研究用冲压发动机燃烧器中进行燃料和空气混合过程的粒子

研究用冲压发动机燃烧器中进行燃料和空气混合过程的粒子

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An ongoing research ramjet program initiated at ONERA under support of DGA
(French ministry of Defence) aims to improve methodology for ramjet combustion chamber
design and tuning by using validated CFD codes. A transparent model rig was used for
aerodynamic tests with air flows at atmospheric pressure and room temperature. In the case of
the simulation of a Solid Ducted Rocket (SDR) combustor, two fuel holes were located at the
head end of the combustor in order to simulate the fuel supply from the auxiliary gas generator
in the case of a real combustor.
Among the various mechanisms that are control领 the development of the combustion
processes inside the combustor, the mixing is certainly one of the most crucial as far as stability
or efficiency are concerned. The work presented in this paper is addressing the
characterization, in absence of combustion, of the turbulent flow velocity and scalar fields
associated to the mixing between fuel (simulated by CO2) and air. Particle image velocimetry
(PIV) and gas samp领 analysis are the two techniques that were used to serve that purpose.
Results presented in this paper are very useful to assess the ability of numerical computations,
based either on Reynolds-Averaged Navier-Stokes (RANS) or Large-Eddy Simulations (LES)
approaches, to reliably predict velocity and fuel concentration fields inside this research
combustor. 德国LaVision PIV/PLIF粒子成像测速场仪 PLIF平面激光诱导荧光火焰燃烧检测系统 激光诱导白炽光烟雾粒子成像分析仪(LII)
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