论文信息 - Subscale Nozzle Testing at the P6.2 Test Stand

Subscale Nozzle Testing at the P6.2 Test Stand

Subscale tests of nozzle flows have been performed at DLR's P6.2 test facility to investigate side-loads and their origin. Two different nozzle contours, a thrust-optimized and a truncated ideal nozzle with identical performance data are tested. The flowfield is monitored by use of wall pressure measurements and Colour Schlieren photos of the plume. The highest side-loads are measured in the thrust-optimized nozzle, when the separation type changes between free shock separation and restricted shock separation. The side-loads of the truncated ideal nozzle, in which only free shock separation occurs, are significantly lower - only about one third as high.

[1] G. Dumnov. Unsteady side-loads acting on the nozzle with developed separation zone , 1996 .

[2] L. H. Nave,et al. Sea level side loads in high-area-ratio rocket engines , 1973 .

[3] R. A. Lawrence. Symmetrical and unsymmetrical flow separation in supersonic nozzles , 1967 .

[4] G. S. Settles,et al. Color schlieren optics - A review of techniques and applications , 1981 .

[5] Helmut Ciezki,et al. Investigation of the Combustion Behaviour of Solid Fuel Slabs in a Planar Step Combustor with a Colour Schlieren Technique , 1999 .

[6] Mikael Bigert,et al. A Sub Scale Investigation on Side Loads in Sea Level Rocket Nozzles , 1999 .

[7] E. Spiegler,et al. Shock-Induced Boundary Layer Separation in Over-Expanded Conical Exhaust Nozzles , 1963 .

[8] Emil Wolf,et al. Principles of Optics: Contents , 1999 .

[9] G. Hagemann,et al. Flow Separation and Side-Loads in Rocket Nozzles , 1999 .

[10] G. Hagemann,et al. Status of Low Separation Prediction in Rocket Nozzles. , 1998 .