Analysis of Base Heating Environment During Ground Testing of a Lunar Lander Demonstrator

Wang, Ten-See ; Canabal, Francisco ; Knox, Kyle ; Hawkins, Robert ; Bergman, Matt

关键词: BASE FLOW;    BASE HEATING;    COMPUTATIONAL FLUID DYNAMICS;    COANDA EFFECT;    GROUND TESTS;    HYPERGOLIC ROCKET PROPELLANTS;    LUNAR LANDING MODULES;    PROVING;    CONVECTIVE HEAT TRANSFER;    HEAT FLUX;    PLUMES;    JET BLAST EFFECTS;    HOVERING ROCKET VEHICLES;   

RP-ID  :  M19-7323

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来源: NASA Technical Reports Server

【 摘 要 】

Introduction: This lunar lander demonstrator, known as XL-1T (terrestrial), is a collaborative effort between Masten Space Systems and NASA, under NASA’s Lunar CATALYST (also known as Lunar Cargo Transportation and Landing by Soft Touchdown) initiative; The lunar lander is a reusable terrestrial test bed for Masten’s powered decent landing system, and will be controlled by four throttleable main engines utilizing green hypergolic propellants; One of the concerns for a four-engine vehicle like this demonstrator, is the potential for a severe base-heating environment, caused by the formation of a “fountain jet” during testing. Fountain jet is an unique base flow physics which was discovered during the development of the DC-X vehicle.