Investigation of Water Spray on Deflector for Cooling Effect of Launch Platform

Résumé fourni par la source

This research investigates the water spray on the deflector for the cooling effect of the launch platform and compares the temperature distribution on the deflector’s bottom surface at various water spraying rates. A one-nozzle launch vehicle gas jet model with drift was simulated using the three-dimensional compressible Navier–Stokes equations, the realizable [Formula: see text] turbulence model, and the Eulerian discrete phase (EDP) model. The installation of the water spray cooling device was demonstrated to reduce the area of the deflector’s high-temperature region because water accumulates at its bottom surface, acting as a protective layer. This causes the high-temperature gas jet to contact the water instead of directly impacting the deflector, while the water evaporates and absorbs heat. Compared with conditions without the water spray cooling device, temperatures across most areas of the deflector’s bottom surface were reduced by approximately 76%. As water spray velocity increases, the peak temperature and the high-temperature region on the deflector’s bottom surface gradually decrease, and the temperature in the area directly impacted by rocket exhaust also decreases. At a water spray velocity of [Formula: see text], the lowest peak temperature occurs on the deflector’s bottom surface, representing a reduction of up to 37.6% compared to that at [Formula: see text].

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.