【摘要】 泵喷推进器转子在艇后非均匀非定常流场中运转，产生以叶频及倍叶频线谱为特征的激励力，在产生直发声的同时通过轴系激励艇体发生水下振动声辐射，叶频及倍叶频线谱构成重要声纹特征，在不同航速下航行时特征线谱消除难。该研究以1.2∶1.0的Suboff艇后某5叶定子4叶转子泵喷推进器为试验对象，在大型空泡水筒中开展了定子后缘小翼主动作动泵喷推进器对转子激励力的闭环控制试验。试验系统由Suboff艇体、后缘小翼主动作动泵喷推进器、转子非定常动力仪、控制器和功率放大器构成。试验以转子非定常动力仪测得的纵向非定常力为反馈物理量，基于系统在线估计的多谐波自适应控制方法实时获得控制最优电压，最优电压通过功率放大器放大后驱动后缘小翼按照给定电压作动，产生二次流动，与泵喷推进器的主流相互作用，达到抑制转子激励力的效果。试验结果表明，在不同航速下，定子后缘小翼主动作动能够有效抑制转子激励力的叶频线谱、二阶叶频线谱，能够有效消除叶频声纹特征。定子后缘小翼主动作动为低噪声泵喷推进器提供了一种新思路。更多还原

【Abstract】 The rotor of the pump jet propulsor operates in a non-uniform and unsteady flow field behind the hull, generating excitation forces characterized by blade passing frequency and its multiples line spectra. While producing straight sound, it excites the hull through the propulsion shafting system to produce underwater sound radiation. The blade passing frequency and its multiple line spectra constitute important voiceprint features, which are difficult to eliminate when sailing at different speeds. This article takes a 5-blade stator and 4-blade rotor pump jet propulsor behind a 1.2∶1.0 Suboff as the experimental object, and conducts closed-loop control experiments on the rotor excitation force of active actuation pump jet propulsor with the stator trailing edge small wing in a large bubble water cylinder. The experimental system consists of a Suboff, stator actuated oscillating trailing edge flaps pump jet propulsor, a rotor unsteady force meter, a controller, and a power amplifier. The longitudinal unsteady force measured by the rotor unsteady force meter was used as the feedback physical quantity. Based on the online estimation harmonic adaptive control method, the optimal control voltage was obtained in real time. The optimal voltage was amplified by the power amplifier and employed to drive the trailing edge flaps to operate according to the given voltage, generating secondary flow and interacting with the main flow of the pump jet propulsor, achieving the effect of suppressing the rotor excitation force at blade passing frequency and its multiples. The experimental results show that the active actuation of the stator trailing edge flaps can effectively suppress the blade passing frequency and its multiple line spectra of the rotor excitation force at different speeds, and eliminate the voiceprint features at blade passing frequency. The stator actuated oscillating trailing edge flaps provides a new approach for low-noise pump jet propulsor.更多还原