CAJ | 학술논문

为检验Kappel桨的噪声性能,在海军工程大学空泡水洞进行背景噪声测量及2种桨模噪声对比试验.本次试验共设计16组工况,分别测量2种桨在无空泡和有空泡时的噪声.由测量结果分析可知,海军工程大学空泡水洞的声学性能满足试验要求,噪声信号在1~20 kHz范围内可获得较高的信噪比.无空泡时,Kappel桨与传统桨的辐射噪声相当;在相同转速空泡数σn下,Kappel桨的空化辐射噪声高于传统螺旋桨的,同时观察其空泡形态,与传统螺旋桨相比Kappel桨的空泡形态要为剧烈,表明在空泡性能方面Kappel桨要低于传统螺旋桨,在Kappel桨的设计过程中应综合考虑螺距与拱弧的关系以改善Kappel桨的空泡性能.
위검험Kappel장적조성성능,재해군공정대학공포수동진행배경조성측량급2충장모조성대비시험.본차시험공설계16조공황,분별측량2충장재무공포화유공포시적조성.유측량결과분석가지,해군공정대학공포수동적성학성능만족시험요구,조성신호재1~20 kHz범위내가획득교고적신조비.무공포시,Kappel장여전통장적복사조성상당;재상동전속공포수σn하,Kappel장적공화복사조성고우전통라선장적,동시관찰기공포형태,여전통라선장상비Kappel장적공포형태요위극렬,표명재공포성능방면Kappel장요저우전통라선장,재Kappel장적설계과정중응종합고필라거여공호적관계이개선Kappel장적공포성능.
To test the noise performance of the Kappel propeller, background noise and propeller noise contrast tests are carried out in the NUE cavitation tunnel. Both wet condition noise and the cavitation noise of the two propellers are measured in the tests under sixteen different working conditions. The analy-sis based on the measurement results indicates that the acoustics performance of the NEU cavitation tunnel satisfies the requirements of the tests, and higher signal-to-noise ratio can be achieved in the frequency range between 1 kHz and 20 kHz. The SPL of the Kappel propeller noise equals to the conventional propel-ler noise under the wet condition. With the same cavitation number, the SPL of the Kappel propeller cavita-tion noise is higher than that of the conventional propeller. Meanwhile, the pattern of the Kappel propeller cavitation is more precise than that of the conventional propeller. It is concluded that the cavitation perfor-mance of the Kappel propeller is poorer than that of the conventional propeller. To improve the cavitation performance, the relationship between pitch and camber should be comprehensively considered in the pro-cess of Kappel propeller designing.