| 1. | Prediction of noise induced by interaction between turbulent flow and propeller blades
船舶螺旋桨叶片与艉部湍流场互作用噪声的预报研究 |
| 2. | A part or surface , such as a wing , propeller blade , or rudder , whose shape and orientation control stability , direction , lift , thrust , or propulsion
翼剖面；机翼；翼面一个部件或平面，如机翼、螺旋桨叶、方向舵等，其形状或方位控制稳定性、方向、抬升、冲击或驱动 |
| 3. | Saw a few planes after we landed , this was the most interesting one , even the propeller blades were protected by a pair of sock - like - covers , the owner must really love his plane
降落后看见机场内停放著不同型号的飞机，最有趣是这台，连螺旋掌也给它包得好好的，想这个主人一定是位很细心、很爱飞机的人。 |
| 4. | Based on the cavitation chart it can be seen that the charging air with appropriate parameters on blade surface is efficient and feasible for improving the cavitation performance of propeller blades
根据翼型在充气前后的压力分布，确定空泡斗的变化，从而可以认定按适当参数提供的二相流对于扩大空泡斗，以改善螺旋桨空泡性能是有益的和可行的。 |
| 5. | This paper presents a design method of propeller blade section operating in non - uniform flow field and an idea of equivalent operating curve with unchanged cavitations characteristic on blade section , the method for selecting the curve is set up
摘要给出了非均匀流场中螺旋桨桨叶剖面的设计方法，提出了保持剖面空泡特征不变的等效运转曲线的思想，并创建了等效运转曲线的确定方法。 |
| 6. | The unknown source strength of cavitation is always arranged on the propeller blade surface in the solving process , but the integration is carried out along the cavity surface of last iterative step when the strength of cavitation dipole is determined according to dynamic condition
求解过程中待求的空泡源强始终布置在桨叶表面上，而在根据动力学条件求解每一步的空泡面元偶极子强度时，积分是沿着上一步迭代确定的空泡表面进行的。 |
| 7. | In lifting - surface theory , the non - liner phenomena of the trailing vortex in the transition wake area and of the tip vortex separation are considered . in surface panel method hyperboloidal quadrilateral panels are employed and the morino ' s analytical formulation is used to determine the influence coefficients . the more reasonable pressure kutta condition is satisfied at the trailing edge of propeller blade
在计算中，对于升力面理论，本论文考虑了过渡区尾涡收缩和叶梢分离的非线型现象的影响；对于面元法，本论文采用的是计算较为简便的基于扰动速度势的基本公式及双曲面形状的面元，在桨叶随边满足更趋合理的压力kutta条件，并用morino导出的解析公式计算面元的影响系数的快速有效的数值预报方法。 |
| 8. | Based on the green ' s formula and the assumption of the propeller blade ' s thin sections , a lifting - surface method of propellers with the vortex lattice and equal source panel distributions on the mean camber surface has been introduced for the prediction of steady propeller ' s hydrodynamics in this paper . an approximate kurta condition was applied
基于creen公式和薄翼理论假设导出的升力面方法，采用在螺旋桨拱弧面上分布离散涡、源布置方法预报均匀流场中的螺旋桨的定常性能，螺旋桨尾涡面上压力连续性条件采用近似的kutta条件处理。 |
| 9. | The paper analyzes the characteristic of aerodynamics with structure of helicopter propeller blade , dissertrates vortex theory and the theory about gliding air field which produce the power of helicopter propeller blade . at the same time it also deduce the method of computing the induced velocity produced by helicopter propeller blade with vortex theory . at last , an influcence to the spreading of sound is discussed
并且将两种定位算法进行了比较，说明了优劣；结合直升机的结构分析了旋翼的空气动力特性，论述了直升机旋翼产生拉力的滑流理论和涡流理论，结合涡流理论论述了直升机旋翼流场诱导速度的计算方法，在此基础上分析了直升机旋翼流场对声音传播的影响。 |
