关键词: 固体火箭发动机;喷管;流场模拟;流场显示

Abstract: A cold-flow simulation experiment is accomplished, in order to study back-wall flowfield features around submerged nozzle of solid rocket motors. The visualization technique of inducting additional substance and sheet lighting are used to carry out flow visualization of the back-wall flowfield, and the results are recorded with a convertional and a television camera.The results show that it is easy to form vortex in back-wall flow field for a submerged nozzle with concave back surface and higher submerging rate under higher flow Reynolds number.Moreover, the internal flowfield is simulated through computer according to the experimental conditions. The pictures of flow visualization are in good accordance with the numerical simulation.

Key words: Solid rocket engine;Nozzle;Flow field simulation;Flow visualization