Modelling of combustion-chamber film-coolant flow in rocket engines

Desmond Adair, Abilkaiyr Mukhambetiyar

Research output: Contribution to conferencePaper

Abstract

The main purpose of this study is to investigate film instability and hence the entrainment mechanisms of the liquid film of cooling flow by computational fluid dynamics (CFD) techniques. In the modelling, a twolayer k-ϵ turbulence model is used with a high Reynolds number k-ϵ turbulence model away from the walls while the near-wall viscosityaffected layer is resolved with a one-equation model. So as to accommodate the two-phase interface, the Scalar Equation (Volume of Fluid) Method was used. In addition to the investigation of entrainment mechanisms, the nature of the film-coolant released into the atmosphere, with and without chemistry (combustion) included is examined. The transient numerical simulations indicate the generation of disturbance waves at the liquid-gas interface for coolant flows above a critical value and their growth result in liquid entrainment. The film-coolant flow was found to persist into the wake, which has environmental implications, in that if afterburning is not used, then cracked large-molecule hydrocarbons are then the primary product instead of soot formation.

Original languageEnglish
Pages925-937
Number of pages13
Publication statusPublished - Jan 1 2018
Event58th Israel Annual Conference on Aerospace Sciences, IACAS 2018 - Tel-Aviv and Haifa, Israel
Duration: Mar 14 2018Mar 15 2018

Other

Other58th Israel Annual Conference on Aerospace Sciences, IACAS 2018
CountryIsrael
CityTel-Aviv and Haifa
Period3/14/183/15/18

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

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  • Cite this

    Adair, D., & Mukhambetiyar, A. (2018). Modelling of combustion-chamber film-coolant flow in rocket engines. 925-937. Paper presented at 58th Israel Annual Conference on Aerospace Sciences, IACAS 2018, Tel-Aviv and Haifa, Israel.