Counter-rotating propellers aerodynamic and aerodynamic noise test technology in wind tunnel
According to the performance evaluation and optimization research requirements of counter-rotating propellers aerodynamic and aerodynamic noise,a high power counter-rotating propellers dynamic simulation test rig was developed based on acoustic wind tunnel,and the data processing method of counter-rotating propellers wind tunnel test was developed.The counter-rotating propellers dynamic simulation test rig was powered by 300 kW electric motor,accelerated by the gear box to realize internal and external drive shaft reverse rotation,and the aerodynamic was measured by rotating shaft balances.After development of the rig,aerodynamic and aerodynamic noise test of counter-rotating propellers were carried out in 5.5 m × 4 m acoustic wind tunnel.The result showed that the rotating speed control accuracy of counter-rotating propellers dynamic simulation test rig was better than 0.5 r/min,the transmission efficiency reached 97.7％,and the test rig operated stably and reliably.The test repeatability accuracy of counter-rotating propellers pull coefficient was better than 0.002 1,that of counter-rotating propellers power coefficient was better than 0.002 2,and that of counter-rotating propellers aerodynamic noise was better than 0.5 dB.
NETL
NSTL
万方数据
