采用数值模拟和实验方法建立声涡束的构建、测试和分析系统，研究极限多普勒效应下的负频率现象；分析声涡旋入射到旋转吸声圆盘后，声能不衰减反而放大的超辐射特性，研究新型能源提取方式。声涡束极限多普勒效应下出现的负频率和超辐射现象，与Penrose旋转黑洞超辐射假设间接相关，可用于解释黑洞、光学、相对论相关的基础物理问题。

发表论文：

1 Lianyun Liu, Yue Han, Xu Zheng, Yi Qiu. "Observation of the extreme Doppler shift of acoustic rotating waves in the time domain." Journal of Applied Physics, 130 (2021) 234904.

2  Lianyun Liu, Xiaojie Cheng, Xu Zheng, Yi Qiu, Zhiyong Hao. "Experimental and numerical study of the rotational Doppler shift in acoustic waves using static microphones." Physics of Fluids, 34 (2022) 047109.

3 Lianyun Liu, Yong Yu, Junlun Hu, Xu Zheng, Yi Qiu, Zhiyong Hao. "Experimental study of acoustic superradiance from a rotating absorber." Journal of Applied Physics, 131 (2022) 164901.