艇尾实尺桨空化初始航速和高频噪声谱的工程预报

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (15) : 71-76.

论文

艇尾实尺桨空化初始航速和高频噪声谱的工程预报

杨琼方1 王永生1 余亮琴３张明敏2

作者信息 +

Prediction of High Frequency Noise Spectrum and Cavitation Inception Speed for Full Scale Propeller behind Submarine in Engineering

YANG Qiongfang1 WANG Yongsheng1 ＹＵＬｉａｎｇｑｉｎ3ZHANG Minming 2

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文章历史 +

摘要

为了实现艇尾实尺桨空化初始航速和高频噪声谱的工程预报，采用模型桨空化多相流模拟和实桨高频噪声谱半经验公式预报相结合的方法，预报了SUBOFF潜艇标称伴流下的实尺度7叶大侧斜桨的空化初始航速和高频噪声谱曲线以及特定频率1kHz处的谱源级。空化模拟和空化初生的较高预报精度由E779A桨的空化形态、空化面积和初生空化数的预报给予了校验。半经验公式的适用性由USS212型潜艇和Agosta-80潜艇的螺旋桨噪声预报给予了校验，精度适中。计算结果表明：7叶桨在水深16.8m时空化初始航速为12.8kn，6kn航速下1kHz处谱级为101.7dB，较相同水深下Agosta-80潜艇临界航速高2.6kn、谱级低0.3dB，表明噪声性能更优。较好地建立了艇尾实尺桨空化初始航速和高频噪声谱预报的工程应用方法。

Abstract

For predicting the cavitation inception speed (CIS) and high frequency noise spectrum of full scale propeller behind submarine in engineering, combing cavitation multiphase simulation for model scale with semi-empirical formulas for high frequency noise spectrum prediction of the full scale propeller was used to investigate the CIS, cavitating noise spectrum curves and spectrum source level at the characteristic frequency 1kHz of the 7-bladed highly-skewed propeller behind full-appended SUBOFF submarine’s nominal wake. Validation of the cavitation simulation and tip vortex inception prediction were conducted by the calculated cavity pattern, area, and initial inception point of E779A propeller. Reasonability of the semi-empirical formulations was validated by the predicted noise spectrum of both USS212 submarine and the Agosta-80 submarine’s full scale propellers, and the precision was acceptable. The calculated results show that the CIS of the 7-bladed highly-skewed propeller is 12.8 knots under 16.8m water depth condition, and the spectrum level at 1kHz frequency for 6 knots speed is 101.7dB, which is 2.6 knots higher than that of the Agosta-80 submarine and 0.3dB lower for the spectrum level, so as to present its best noise performances. The numerical method proposed can be a productive approach to assess the full scale propeller’s critical speed and high frequency noise characteristics behind the submarine in engineering.

导出引用

杨琼方王永生余亮琴张明敏. 艇尾实尺桨空化初始航速和高频噪声谱的工程预报[J]. 振动与冲击, 2013, 32(15): 71-76

YANG Qiongfang WANG Yongsheng ＹＵＬｉａｎｇｑｉｎZHANG Minming . Prediction of High Frequency Noise Spectrum and Cavitation Inception Speed for Full Scale Propeller behind Submarine in Engineering[J]. Journal of Vibration and Shock, 2013, 32(15): 71-76