Acoustic Radiation Calculation Based on Additional Sources Wave Superposition Method
Xia Xuebao1, 2,Xiang Yang 1, 2
1.School of Energy and Power Engineering, WUT, Wuhan 430063, China; 2.Key Laboratory of Marine Power Engineering & Technology Ministry of Communication, Wuhan 430063,China
Abstract：The additional sources wave superposition method is a method by adding additional sources arbitrary based on monopole wave superposition method, which could overcome the problem of non-uniqueness for fictitious wave numbers encountered with monopole wave superposition method. Three examples, pulsating sphere source, swing sphere and cube radiator are given. Numerical results demonstrate that the non-uniqueness problem can be removed by adding one source for pulsating sphere source. In addition, the non-uniqueness problem also can be solved by adding more additional sources for swing sphere source, but the computational accuracy will decline with the number of additional sources rising. By increasing the number of monopole sources, the additional sources wave superposition method can achieve high accuracy. The additional wave superposition method is inefficiency than wave superposition method with complex radius vector, but it is more efficient than the tripole wave supposition method. For the cube radiator, the acoustic uniqueness solution is obtained by adding the optimized number of additional sources.
2015, Vol. 34 
