The hydrodynamic noise test for a cone-cylinder composed structure is done. Its hydrodynamic noise law for different flow velocity is analyzed. Based on a gravitational water tunnel testing system, experimental model of the cone-cylinder combined structure and the scheme of measurement test are designed. Influence of flow velocity on the hydrodynamic noise is given. Results of the test show that the hydrodynamic noise of the cone-cylinder combined structure is smaller in the range of low-middle flow velocity, while increases rapidly with the speed increasing. At the velocity of 8.59m/s, the increase of the noise source level of the hydrodynamic noise in high frequency range is very large due to the cavitation effect produced by the fluid and the model.%开展锥柱组合结构水动力噪声试验,研究不同流速情况下结构的水动力噪声规律.基于重力式水洞试验场地,设计锥柱组合结构试验模型与水动力噪声测量试验方案,开展锥柱组合结构水动力噪声试验,对比不同流速情况下锥柱组合结构水动力噪声特性,阐述流速对锥柱组合结构水动力噪声的影响规律;试验表明:在中低流速情况下,锥柱组合结构的水动力噪声较小;但随着流速的增大,其水动力噪声迅速增大;当来流速度达到8.59 m/s时,由于流体与模型产生的空化效应,锥柱组合结构在高频时的水动力噪声声源级增幅较大.
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