2D and 3D Modeling Efforts in Fuel Film Cooling of Liquid Rocket Engines (Conference Paper with Briefing Charts)
Air Force Research Laboratory (AFMC) AFRL/RQRC Edwards AFB United States
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Two- and three-dimensional simulations of slot injection of fuel film cooling have been carried out using an unsteady detached eddy simulation DES turbulence model at operating conditions relevant to liquid rocket engine LRE thrust chambers. The aim of this study is to determine what parameters drive unsteadiness in fuel films, and how these parameters affect wall temperature profiles. Parametric studies performed in 2D suggest that a Helmholtz resonator exists for simple slot geometries. Frequencies in 3D were observed to be of a lower frequency, with a rich mix of modes driving unsteadiness. Changing the shape of the inlet had a strong impact on both unsteadiness and wall temperature profile. These simulations do not capture trends seen in experimental results, but do provide insight into the complex nature of fuel film cooling.
- Rocket Engines
- Fluid Mechanics