氢氧发动机真空羽流干扰试验研究

To investigate the effects of plume interaction caused by multiple spacecraft engines on the flow field structure and parameters, the pressure fields of single plume and dual plumes generated by hydrogen/oxygen engines with 60 N thrust were determined using a pitot tube array in vacuum plume effect experimental system (PES) of Beihang University. The experimental results show that the pressure in the single plume field decreases rapidly with the increase of axial distance, and the location of the maximum pressure along the same axial distance gradually deviates from the nozzle axis due to the compression waves generated from the bell nozzle. Plume interaction occurs in the region between the dual prime plumes, whose action range and intensity increase with the increase of axial distance. To the highest degree, the pressure of the interacted plume can be more than 5 times that of the single plume at the same point. The location of the maximum pressure along the same axial distance gradually deviates from the symmetry plane of the dual engines due to the compression waves' boundary of the interacted plume.