应土木工程学院陈文礼教授和陈冠斌副研究员的邀请，韩国釜山国立大学（Pusan National University），韩国翰林院院士、Journal of Visualization主编Kyung Chun Kim教授将于2026年03月04日到03月20问我校，并作报告，欢迎感兴趣的师生参加。
报告时间：2026年03月12日 9:30-11:00
报告地点：土木工程学院303会议室
报告主题：Enhancing oscillations of bladeless wind energy harvesters with a downstream obstacle for bluff body
Abstract
This study introduces a novel and efficient Bladeless Wind Energy Harvester (BWEH). The system is composed of a “Recti-Generator”, a combination of a mechanical rectifier, flywheel, and generator, which is connected to a circular bluff body attached to a flexible beam. The efficiency of the Recti-Generator was determined to be over 69 %. To enhance the oscillations of the bluff body and thereby increase the efficiency of the BWEH, a downstream obstacle was employed. Flow visualization reveals that the obstacle suppresses vortex shedding, causing the vortices to merge with subsequent ones and resulting in large-amplitude, low-frequency galloping. The performance of the system when embedded in an atmospheric boundary layer was experimentally investigated. Experiments were conducted in a closed-return, large-scale subsonic wind tunnel, in which different layouts of BWEH assemblies were analyzed. The Reynolds number, based on the cylinder diameter, ranged from Re = 1.7 × 104 to 4.3 × 104. The inclusion of the downstream obstacle induces a galloping phenomenon, increasing the single-unit power coefficient (Cp) from an average of 0.25 %–15.47 %. In multi-unit configurations, a triangle (▴) layout proved optimal, achieving an average Cp of 24.0 %, demonstrating high efficiency at low operational wind speeds (2.5–4 m/s) suitable for urban environments.
报告人Kyung Chun Kim教授简介
Prof. KC Kim received his BA degree at Pusan National University, Korea in 1979. He received MS and Ph.D degree at KAIST, Korea in 1981 and 1987 respectively. Since 1983, he is a professor at School of Mechanical Engineering in Pusan National University (PNU), Korea. He was invited as a visiting professor from Ottawa University in Canada for 1989-1990. He joined at the department of theoretical and applied mechanics in University of Illinois, Urbana-Champaign, USA as an invited professor for 1996-1997. He was invited as a special foreign professor from the University of Tokyo, Japan for 2009-2010. On the basis of his research outcomes, he became a member of National Academy of Engineering in Korea in 2004. He received the outstanding paper awards (1995, 2002) from KSME and KOSEF. In 2009 and 2016, he received the Academic award and the first Yeosong award from KSME. He received Nakayama award in 2012 and Asanuma award in 2014 based on contributions in world Visualization society. KC Kim was selected as a PNU Distinguished Professor in 2018. In 2019, he received Busan Science and Technology award.
Prof. KC Kim is currently serving as an Editor in Chief for Journal of Visualization. In 2020, he was selected as the director of Regional Leading Research Center for Eco-friendly Smart Ship. His research interests include: Turbulence, Two-Phase Flows, Flow Visualization, and Artificial Intelligence.
