Modeling Fuel Film Cooling on Rocket Engine Walls

Bills, Jacob; Crowe, Darrell S.; Rutledge, James L.; Coy, Edward B.

doi:10.2514/6.2016-2149

Cited by 1 publication

(2 citation statements)

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“…Since film cooling involves heat transfer through the solid–fluid interface, it is inherently a conjugate heat transfer problem. A two-dimensional numerical simulation with multiphase modeling carried out by Bills et al [ 29 ] showed that the accuracy of the conjugate heat transfer predictions of film cooling could be improved by incorporating the embedded coolant channel geometry and species composition. A comprehensive review of film cooling literature can be found in Shine and Shrinidhi [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

“…With an emphasis on exploring the means to improve cooling effectiveness, this study focuses on the development of the mixing layer and its impact on the temperature field. Conjugate heat transfer modeling [ 29 ] is used to comprehensively analyze the fluid-to-solid transfer of thermal energy. In line with the objectives, this study: Explores the potential of a novel method of tangential injection through a diverging injector.…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of Film Cooling Effectiveness in a Supersonic Nozzle

Somasekharan

Srikrishnan

Kumar

et al. 2023

Entropy

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Film cooling as applied to rocket nozzles is analyzed numerically with emphasis on the assessment of the effect of the mixing of coolant with the hot stream. Cooling performance, as characterized by cooling effectiveness, is studied for three different coolants in the three-dimensional, turbulent flow field of a supersonic convergent-divergent nozzle operating with a hot stream temperature of 2500 K over a range of blowing ratios. The coolant stream is injected tangentially into the mainstream using a diffuser-type injector. Parameters influencing the effectiveness, such as coolant injector configuration and mixing layer, are analyzed. Thermal and species mixing between the coolant and the mainstream are investigated with regard to their impact on cooling effectiveness. The results obtained provide insight into the film cooling performance of the gases and the heat transfer characteristics associated with these three gases. An injector taper angle of 30° results in the most effective cooling among the configurations considered (0°, 15°, 30° and 45°). Mixing of the coolant with the hot stream is examined based on the distributions of velocity, temperature and species. The higher values of cooling effectiveness for Helium are attributed to its thermophysical properties and the reduced rate of mixing with the hot stream. The results further indicate that through optimization of the blowing ratio and the coolant injector configuration, the film cooling effectiveness can be substantially improved.

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Section: Introductionmentioning

confidence: 99%