MACH 6 COMBUSTION TESTS OF A SCRAMJET ENGINE - EFFECT OF STRUT AND ISOLATOR-

摘要

The main purposes of this study are to investigate the effect of strut configurations and isolator length within the engine on the engine performance at Mach 6 condition, and to determine performance of the engine by gas sampling at the exit plane. The subscramjet engine had an overall length of 2,100 mm, height of 250 mm and width of 200mm and was tested at the Ram Jet engine Test Facility (RJTF) of the Kakuda Research Center ,NAL.In the tests were compared the effects of strut configurations in an engine with a 200-mm long isolator on the engine performance. The thrust was measured a along the fuel flow rate, and the fuel distribution at the engine exit plane was measured by means of gas sampling .It was found that the strut configuration had an effect on the thrust performance, that the 200mm-ling isolator was effective in preventing combustor/inlet interaction in the engine with full-height strut, and that the fuel distribution in the engine was not uniform which affected the thrust performance. The maximum thrust obtained was 1620N at the fuel flow rate of 70g/s (the bulk equivalence ratio of 0.4).