US-Japan Joint Seminar: Abnormal Flow Phenomena in Turbomachines-From Avoidance to Suppression and Control

小行星9726626 该奖项支持美国科学家和工程师参与美国- 1998年10月26日至29日在日本大坂举行的日本涡轮机异常流动现象研讨会--从避免到抑制和控制。 共同组织者是约翰霍普金斯大学的约瑟夫·卡茨教授和日本大坂大学的冢本忍。 研讨会将侧重于基本的流动机制，现有的手段来检测，计算和测量，以及现有的和潜在的未来有效的对策。 涡轮机正被用于越来越苛刻的条件，以满足更高的性能要求和更广泛的应用。 在这样的条件下，各种“异常”的流动现象，如旋转空化，旋转失速，喘振，和大量的流动分离发生。 除了对性能产生不利影响并导致振动和噪声水平增加外，这些异常现象还可能并且确实经常导致部件和系统故障。 因此，除了满足传统的设计目标，如性能和效率的提高，它是越来越重要的是要了解导致这些异常现象的潜在机制，并制定有效的对策。 参与者将明确识别主要的流动现象，并推荐避免，抑制和控制的策略。 美国研究人员在理论、计算和实验研究工具方面经验丰富，而日本研究人员在流动的基础和实践方面具有专业知识。 研讨会汇集了来自学术界、工业界和政府的研究人员。 此外，还将包括博士后研究人员。 与日本专家在这一领域的想法和数据交流将使美国参与者能够推进自己的工作，并为未来的合作项目奠定基础。 ***

9726626 Katz This award supports the participation of American scientists and engineers in a U.S.-Japan seminar on Abnormal Flow Phenomena in Turbomachines -- From Avoidance to Suppression and Control, to be held in Osaka, Japan from October 26-29, l998. The co-organizers are Professors Joseph Katz of Johns Hopkins University and Oshinobu Tsujimoto of Osaka University in Japan. The seminar will focus on the underlying flow mechanisms, available means to detect, compute and measure them, as well as existing and potential future effective countermeasures for them. Turbomachines are being used in increasingly more severe and demanding conditions in order to meet higher performance requirements and a wider range of applications. Under such conditions, various kinds of "abnormal" flow phenomena, such as rotating cavitation, rotating stall, surge, and massive flow separation occur. Besides having adverse effects on the performance and causing increased levels of vibrations and noise, these abnormal phenomena can and do regularly lead to component and system failures. Thus, in addition to meeting conventional design targets, such as improvements in the performance and efficiency, it is becoming increasingly important to understand the underlying mechanisms causing these abnormal phenomena and develop effective counter-measures against them. The participants will develop clear identification of the dominating flow phenomena and recommended strategies for avoidance, suppression and control. The U.S. researchers are experienced in theoretical, computational and experimental research tools while the Japanese have expertise in the fundamental and practical aspects of flows. The seminar brings together researchers from academia, industry and government. In addition, postdoctoral researchers will be included. The exchange of ideas and data with Japanese experts in this field will enable U.S. participants to advance their own work, and will set the stage for fu ture collaborative projects. ***