船海工程
船海工程
선해공정
SHIP & OCEAN ENGINEERING
2015年
4期
37-40
,共4页
对转桨%CFD%水动力性能%噪声特性
對轉槳%CFD%水動力性能%譟聲特性
대전장%CFD%수동력성능%조성특성
contra-rotating propeller%CFD%hydrodynamic performance%noise characteristics
为建立有效的预报对转桨无空泡噪声特性的方法，基于CFD方法对CRP－7对转桨进行数值仿真。使用FLUENT 14．0计算均匀来流下的瞬态水动力性能，利用FLUENT 14．0中的声学仿真模块进行无空泡线谱噪声的数值模拟分析，将数值计算得到的声压频谱曲线同理论计算值进行对比，再模拟并分析噪声指向性。实验值与理论计算值对比表明，所构建的计算方法可靠。对转桨无空泡线谱噪声呈周期性脉动的规律及近桨处声指向性为与单桨不同的类“8”字形分布。
為建立有效的預報對轉槳無空泡譟聲特性的方法，基于CFD方法對CRP－7對轉槳進行數值倣真。使用FLUENT 14．0計算均勻來流下的瞬態水動力性能，利用FLUENT 14．0中的聲學倣真模塊進行無空泡線譜譟聲的數值模擬分析，將數值計算得到的聲壓頻譜麯線同理論計算值進行對比，再模擬併分析譟聲指嚮性。實驗值與理論計算值對比錶明，所構建的計算方法可靠。對轉槳無空泡線譜譟聲呈週期性脈動的規律及近槳處聲指嚮性為與單槳不同的類“8”字形分佈。
위건립유효적예보대전장무공포조성특성적방법，기우CFD방법대CRP－7대전장진행수치방진。사용FLUENT 14．0계산균균래류하적순태수동력성능，이용FLUENT 14．0중적성학방진모괴진행무공포선보조성적수치모의분석，장수치계산득도적성압빈보곡선동이론계산치진행대비，재모의병분석조성지향성。실험치여이론계산치대비표명，소구건적계산방법가고。대전장무공포선보조성정주기성맥동적규률급근장처성지향성위여단장불동적류“8”자형분포。
In order to establish an effective method to predict the non-cavitation noise characteristics of the contra-rotating propeller, the CRP-7 contra-rotating propeller's noise characteristics are simulated by CFD method.The FLUENT 14.0 is used to calculate the transient hydrodynamic performance of propeller in the condition of uniform flow, and analyze the non-cavitation line-spectrum noise of CRP-7 by acoustic simulation module.The CRP-7 noise directivity is simulated.The reliability of the method is validated by comparing the experimental values with the theoretical one.It is found that the non-cavitation line-spec-trum noise of CRP-7 present the law of the periodic pulse, and the sound directivity distribution is similar to"8"shape near pro-peller which is different from the single propeller.
