Comparison of the single/multi transverse jets under the influence of shock wave in supersonic crossflow

• Published in: Acta astronautica Vol. 123; pp. 283 - 291
• Main Authors: Barzegar Gerdroodbary, M., Rahimi Takami, M., Heidari, H.R., Fallah, Keivan, Ganji, D.D.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2016
• Subjects: Combustion chamber; Hydrogen; Hydrogen jet; Injectors; Jets; Mathematical models; Mixing of transverse micro/single jets; Numerical simulation; Pressure ratio; Shear stress; Shock waves; Supersonic combustion; Supersonic flow; Supersonic flow; Mixing of transverse micro/single jets; Numerical simulation; Combustion chamber; Hydrogen jet
• ISSN: 0094-5765; 1879-2030
• DOI: 10.1016/j.actaastro.2016.03.031

In this study, the effects of the shock wave on sonic transverse hydrogen through single and multi-jets for supersonic combustion were investigated numerically. This study presents the fundamental flow physics of the interaction between fuel jets (single or multi array) and incident shock waves into a Mach 4.0 crossflow. Parametric studies were conducted on the performance of the shock wave by using the RANS equations with Menter's Shear Stress Transport turbulence model. In a parametric study, both the streamwise spacing and jet-to-freestream total pressure ratio are varied. For all downstream mixing, the associated flow behavior was found to be a direct result of both the type of injection (single/Multi jet) and interactions between shock waves and injectors. According to the results, shock wave reduces the maximum concentration of the hydrogen jet more than 20% in both single and multi jet. Furthermore, a significant increase (approximately 40%) occurs in the mixing of the hydrogen jet at downstream when shock generator is presented in the multi jet with PR=0.27. Moreover, hydrogen-air mixing rate extends in streamwise direction as the jet space increases. Thus, an enhanced mixing zone occurs in the in far downstream of the jet and the shock wave. •The influences of shock wave on single/multi transverse hydrogen jet are compared.•Parametric studies were conducted on the efficiency of shock on mixing by using RANS.•The results show that significant increase (up to 40%) occurs in the mixing of the hydrogen jet at downstream.