Aiming at the problem that it is difficult to accurately predict the aerodynamic noise in the safety valve exhaust process, a new numerical simulation method that comprehensively considers the dipole sources and the quadrupole sources is proposed. The RNG k–ε model is used to simulate the steady-state flow fields, LES numerical method is used to simulate the transient flow, and then the unsteady disturbances are used as source terms in the generalized FW–H solver incorporating the dipole and quadrupole terms to solve for the acoustic field. This simulation method is used to calculate the exhaust noise of the safety valve under six different operating conditions, the sound source characteristics of the exhaust noise of the safety valve are analyzed, and the safety valve exhaust test of different working conditions was carried out. The results show that the relative errors of total sound pressure level between simulation and test does not exceed 5% under different exhaust pressures and different opening heights of the safety valve flap. By comparing the total sound pressure level logarithmically superimposed with the total sound pressure level of the dipole and the quadrupole, the sound source characteristics of the aerodynamic noise of the safety valve are mainly dominated by the sound source of the quadrupole. As the opening height of the safety valve flap and exhaust pressure increase, the total sound pressure level of the safety valve exhaust noise increases, while the relative errors between the simulation results and test data decrease. The proposed simulation method can be accurately applied to the prediction of the safety valve exhaust noise, and the prediction accuracy of this simulation method also increases when the opening height of the safety valve flap and exhaust pressure increase.

针对安全阀排气过程中难以准确预测空气动力噪声的问题，提出了一种综合考虑偶极子源和四极子源的数值模拟方法。该RNG ķ - ε模型用于模拟稳态流场，LES数值方法用于模拟瞬态流，然后非稳态扰动被用作结合了偶极子和四极子项的广义FW-H解算器中的源项。声场。该仿真方法用于计算六种不同工况下安全阀的排气噪声，分析了安全阀排气噪声的声源特性，并进行了不同工况的安全阀排气测试。结果表明，在不同的排气压力和不同的安全阀瓣开启高度下，模拟与试验之间的总声压级相对误差不超过5％。通过将对数叠加的总声压级与偶极和四极的总声压级进行比较，安全阀的空气动力噪声的声源特性主要由四极的声源决定。随着安全阀阀瓣的打开高度和排气压力的增加，安全阀排气噪声的总声压级增加，而模拟结果和测试数据之间的相对误差减小。所提出的仿真方法可以准确地应用于安全阀排气噪声的预测，并且随着安全阀风门的打开高度和排气压力的增加，该仿真方法的预测精度也会提高。安全阀空气动力噪声的声源特性主要由四极子的声源决定。随着安全阀阀瓣的打开高度和排气压力的增加，安全阀排气噪声的总声压级增加，而模拟结果和测试数据之间的相对误差减小。所提出的仿真方法可以准确地应用于安全阀排气噪声的预测，并且随着安全阀风门的打开高度和排气压力的增加，该仿真方法的预测精度也会提高。安全阀空气动力噪声的声源特性主要由四极子的声源决定。随着安全阀阀瓣的打开高度和排气压力的增加，安全阀排气噪声的总声压级增加，而模拟结果和测试数据之间的相对误差减小。所提出的仿真方法可以准确地应用于安全阀排气噪声的预测，并且随着安全阀风门的打开高度和排气压力的增加，该仿真方法的预测精度也会提高。安全阀排气噪声的总声压级增加，而模拟结果与测试数据之间的相对误差减小。所提出的仿真方法可以准确地应用于安全阀排气噪声的预测，并且随着安全阀风门的打开高度和排气压力的增加，该仿真方法的预测精度也会提高。安全阀排气噪声的总声压级增加，而模拟结果与测试数据之间的相对误差减小。所提出的仿真方法可以准确地应用于安全阀排气噪声的预测，并且随着安全阀风门的打开高度和排气压力的增加，该仿真方法的预测精度也会提高。