XIE Liang,LI Qing-lin,ZHANG Chi,SHENG Chao,DU Yin-wei.Test Study on Thrust Performance of 3-bearing Swivel Duct Nozzle[J].航空发动机,2021,47(5):26-33 |
Test Study on Thrust Performance of 3-bearing Swivel Duct Nozzle |
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Key Words:3-bearing vectoring nozzle thrust decoupling method aeroengine |
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Abstract:According to the thrust measurement requirements of 3-bearing swivel duct nozzle,the principle and characteristics of the
self-built 6-component-force test-rig were introduced. The variable angle exhaust structure was developed to eliminate exhaust interfer?
ence. The symmetrical and vertical air inlet mode was combined with the non-contact sealing structure to eliminate the additional aerody?
namic force of the air inlet. According to the characteristics of 6-component-force test-rig,a linear decoupling algorithm was developed
and applied to vector thrust data processing. The variation of vector thrust with different deflection angle and nozzle pressure ratio was ob?
tained and the uncertainty was analyzed. The results show that the coupling error of the 6-component-force test-rig is reduced to about 1%
by using the decoupling algorithm. The vector thrust loss is small when the 3-bearing swivel duct nozzle deflection angle is small,and the
thrust loss becomes larger when the deflection angle is greater than 60°. With the deflection angle increases,the axial force decreased and
the pitching force increase,and the thrust deflection angle is consistent with the 3-bearing swivel duct nozzle deflection angle. Comparing
the test results with the relevant research results,it is found that the variable regularity is the same. |
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