| 超空泡航行体非定常流体动力延迟效应水洞试验研究 |
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| 引用本文： | 刘喜燕,袁绪龙,王鹰,罗凯,汪新禹.超空泡航行体非定常流体动力延迟效应水洞试验研究[J].实验流体力学,2021,35(5):26-33. |
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| 作者姓名： | 刘喜燕 袁绪龙 王鹰 罗凯 汪新禹 |
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| 作者单位： | 西北工业大学 航海学院，西安 710072 |
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| 摘 要： | 空泡延迟效应在机动航行诱发的尾拍振荡中影响显著，是超空泡航行体的重要力学特性，在动力学建模中必须加以考虑。采用人工通气超空泡的试验方法，在西北工业大学高速水洞实验室开展了超空泡航行体连续变攻角测力试验研究，测量攻角与流体动力随时间变化历程来定量分析延迟时间特性。通过试验研究，获得了不同试验条件下变化的延迟时间；无量纲化的延迟系数与水速近似成线性关系，且随预置舵角的增大而增大；在试验采用的摆动频率中，摆动频率较大的工况，延迟系数较小。
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| 关 键 词： | 超空泡航行体 尾拍效应 机动航行 延迟效应 水洞试验 |
| 收稿时间： | 2021-04-29 |
Experimental study on time-delay effect of unsteady hydrodynamics of the supercavitating vehicle in water tunnel |
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| Affiliation: | School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China |
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| Abstract: | The cavity-delay-effect has a significant impact on the tail slapping induced by maneuvering, and it is an important mechanical characteristic of supercavitating vehicles, which must be considered in dynamic modeling. The experimental method of artificial ventilated supercavitation is used in the laboratory of Northwestern Polytechnical University’s high-speed water tunnel to carry out the continuous variable angle of attack experiment. The delay time is quantitatively analyzed by measuring the changes of attack angle and dynamic force with time. Varying delay times are obtained under different conditions, and the dimensionless time-delay coefficient is approximately linearly related to the water speed. The time-delay coefficient increases with the increase of the preset rudder angle. Among the oscillation frequency used in the experiment, the larger the oscillation frequency is, the smaller the time-delay coefficient is. |
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