Experimental investigation of convective heat transfer in a linear aerospike nozzle
Aviation technics and technology
Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia
AbstractExperimental research of convective heat transfer on a central body (plug) of linear aerospike nozzle is submitted. The model consists of a plug nozzle with external expansion flow and two flat supersonic slot-hole nozzles of preliminary (internal) expansion. Hot gas with total temperature 800-1000 К - products of ethanol combustion in air is used as a propulsive medium of model. A calorimetric method has been chosen to measure convective heat fluxes along a surface of truncated plug and in its base area at various nozzle regimes. The research goal is to retrieve empirical data for an evaluation of plug thermal conditions, which can be used to create the nozzle thermal protection in perspective linear rocket engines of reusable space launchers.