Gaseous film cooling investigation in a multi-element splash platelet injector
Acta Astronautica, ISSN: 0094-5765, Vol: 144, Page: 353-362
2018
- 10Citations
- 7Captures
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Article Description
Film cooling is an effective technique that protects chamber walls in rocket combustion against chemical attacks and heat fluxes. This study discusses cooling effect in a multi-element GO 2 /CH 4 splash platelet injector. Influence parameters, such as slot height, slot number, percentage of coolant, and injection position on cooling effect, were investigated. GCH4 with 298.15 K was applied as film coolant. In the first step, slot heights of 0.2 and 0.4 mm were compared by applying a constant film mass flow rate. Temperature, CH 4 mole fraction distribution, and flow field structure were obtained. The effects of slot number, percentage of coolant, and injection position on wall temperature distribution were then determined. Finally, the reasons for the low cooling efficiency were analyzed. Improvement in the method is proposed to achieve improved cooling effect for splash platelet injectors.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0094576517317757; http://dx.doi.org/10.1016/j.actaastro.2017.12.045; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85041404957&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0094576517317757; https://dx.doi.org/10.1016/j.actaastro.2017.12.045
Elsevier BV
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