CAJ | 학술논문

为了给调距机构的设计提供参考依据,该文采用数值方法对调距过程桨叶的水动力性能进行了研究.比较了调距桨调距过程与定螺距流场数值模拟方法的差异,运用计算流体力学中的动网格技术数值模拟了调距桨调距过程的流场.为了满足动网格的要求和保证网格更新过程中桨叶附近高的网格质量,对计算区域作了特殊处理.进行调距过程数值计算之前,用敞水试验数据验证了3种定螺距情况下数值计算结果.调距过程数值计算通过自定义函数控制桨叶的运动规律.计算结果表明,正常调距过程桨叶水动力性能与定螺距情况相差较小,该结论与理论分析结果一致.
위료급조거궤구적설계제공삼고의거,해문채용수치방법대조거과정장협적수동력성능진행료연구.비교료조거장조거과정여정라거류장수치모의방법적차이,운용계산류체역학중적동망격기술수치모의료조거장조거과정적류장.위료만족동망격적요구화보증망격경신과정중장협부근고적망격질량,대계산구역작료특수처리.진행조거과정수치계산지전,용창수시험수거험증료3충정라거정황하수치계산결과.조거과정수치계산통과자정의함수공제장협적운동규률.계산결과표명,정상조거과정장협수동력성능여정라거정황상차교소,해결론여이론분석결과일치.
Controllable pitch propeller (CPP) blade performance was analyzed using numerical methods in order to improve the design of the pitch adjusting unit. Methods of simulating propeller flow regions for variable pitch and fixed pitch propellers were compared. Flow regions of a controllable pitch propeller during the process of adjusting pitch were simulated using the dynamic mesh method. In order to satisfy the requirements of the dynamic mesh and ensure good mesh quality, the CPP's simulation region was processed specially. Open water performance at three CPP pitches was validated with experimental data. Blade movement was controlled by a user defined function. Calculation results showed that CPP performance when adjusting pitch is similar to fixed pitch conditions. This conclusion is identical to the results of theoretical analysis.