| 带前缘结节叶片导管桨尾流不稳定性分析 |
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| 引用本文： | 张习迪,曹留帅,万德成.带前缘结节叶片导管桨尾流不稳定性分析[J].海洋工程,2023,41(2):73-85. |
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| 作者姓名： | 张习迪 曹留帅 万德成 |
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| 作者单位： | 1.上海交通大学 船海计算水动力学研究中心（CMHL） 船舶海洋与建筑工程学院，上海 200240
2.浙江大学 海洋学院， 浙江 舟山 316021 |
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| 基金项目： | 国家自然科学基金资助项目（52001210， 52131102， 51879159）； 国家重点研发计划项目（2019YFB1704200） |
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| 摘 要： | 导管桨的尾流不稳定性在其性能评价中非常重要，不但是其能否提供稳定推力的保证，而且也与螺旋桨的尾流噪声直接相关。为了改善导管桨的尾流，提高尾流稳定性，并优化导管桨的流场脉动，根据座头鲸鳍肢前缘结节的仿生原理，对导管桨叶片的导边进行改进，提出了两种仿生桨型，采用IDDES湍流模型对低进速系数下常规导管桨和仿生叶片导管桨进行数值模拟，探究叶片构型对导管桨性能和尾流不稳定性的影响。计算结果表明，前缘结节可以有效降低叶片受力波动的幅值和叶片所受合力的主频域峰值，具有较大结节的叶片对导管桨尾流有明显的优化作用，在尾流远场中扩大了流动稳定区，延后了尾流处涡破碎的发生，改善了能量谱密度的频域分布。进一步，大前缘结节叶片导管桨应用在低速工况下时，可以大量减少尾流泄涡区域的二次涡产生，这是由于前缘结节提升了相邻涡互感的强度，使得尾流更加稳定，而小结节叶片仿生桨型对导管桨尾流则无明显优化作用。研究方法和成果可为螺旋桨尤其是导管桨尾流不稳定性研究提供参考，不仅验证了前缘结节在导管桨叶片应用的合理性，而且揭示了其优化尾流稳定性的机理。
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| 关 键 词： | 导管桨 尾流不稳定性 仿生叶片 IDDES 能量谱密度 |
| 收稿时间： | 2022/4/28 0:00:00 |
Analysis of wake instability of a ducted propeller with bionic tubercle leading-edge |
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| ZHANG Xidi,CAO Liushuai,WAN Decheng.Analysis of wake instability of a ducted propeller with bionic tubercle leading-edge[J].Ocean Engineering,2023,41(2):73-85. |
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| Authors: | ZHANG Xidi CAO Liushuai WAN Decheng |
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| Abstract: | The wake instability of ducted propeller is very important in its performance evaluation, not only whether it can provide a guarantee of stable thrust, but also directly related to the wake noise of the propeller. In order to improve the wake flow and wake stability of ducted propeller, and optimize the flow field pulsation, the leading edge of the ducted propeller blade was improved according to the bionic principle of the leading edge of the humpback flipper, and then two types of bionic ducted propellers were proposed. Combined with the IDDES turbulence model, the original ducted propeller and the bionic blade ducted propellers were numerically simulated at low speed coefficients, and the effects of blade configurations on the loads and wake instability of the ducted propellers were explored. The calculation results show that the bionic tubercle leading-edge can effectively reduce the amplitude of the blade force fluctuation and the main frequency domain peak value of the resultant force on the blade. The larger nodule blade has an obvious optimization effect on the wake of the ducted propeller, and the flow stability region is improved in the wake far field, and the occurrence of wake breakup is delayed, the frequency domain distribution of the power spectral density is optimized. Furthermore, in the application of large bionic tubercle leading-edge under low speed conditions of ducted propellers, the generation of secondary vortices in the wake vortex discharge region can be greatly reduced, because the bionic tubercle leading-edge improve the mutual inductance of adjacent vortices. However, the bionic propeller type of small nodular blade proposed in this paper has no obvious optimization effect on the wake of the ducted propeller. The research methods and research results in this paper can provide a reference for the wake instability of propellers, especially ducted propellers, verify the rationality of the application of bionic tubercle leading-edge in ducted propeller blades, and expound its optimization of wake stability mechanism. |
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| Keywords: | ducted propeller wake instability bionic blade IDDES power spectral density |
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