考虑进口非均匀的喷管设计及冷流条件下的性能研究

doi:10.7527/S1000-6893.2013.0452

Abstract

Abstract:

A scramjet nozzle is directly connected to the combustor and there is no contraction section or throat, which makes the nozzle entrance flow nonuniform, it is therefore necessary to obtain the design method for a scramjet nozzle with nonuniform entrance flow. In this paper, a scramjet nozzle is designed using the rotational method of characteristics which takes into consideration the nonuniform entrance flow effects. Experimental and numerical studies are performed to investigate the aerodynamic performance of this scramjet nozzle in conditions of cold flow, and the comparison is made with the nozzle which is designed with a uniform entrance flow in the same condition. Results obtained from the comparison conclude that the performance improvement obtained from the nonuniform nozzle design is about 0.6%-2.0% for thrust, 82.0% for negative lift, and 8.6%-13.0% for pitch moment, which demonstrates it is highly necessary to take into consideration the nonuniform distribution of entrance flow parameters when designing a scramjet nozzle.

Key words: scramjet, nozzle design, nonuniform entrance flow, aerodynamic performance, numerical simulation, experiment

CLC Number:

V231.3

MO Jianwei, XU Jinglei, QUAN Zhibin, YU Kaikai. Design and Cold Flow Experiment of a Scramjet Nozzle Considering Nonuniform Entrance Flow Effects[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014, 35(3): 706-713.

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Design and Cold Flow Experiment of a Scramjet Nozzle Considering Nonuniform Entrance Flow Effects

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