Influence of Karman Vortex Street on the Broad Band Noise Generated from a Multi-Blade Fan

2005 ◽  
Vol 71 (711) ◽  
pp. 2686-2693 ◽  
Author(s):  
Souichi SASAKI ◽  
Yoshio KODAMA ◽  
Makoto HATAKEYAMA
Keyword(s):  
Broad Band ◽  
Vortex Street ◽  
Karman Vortex Street ◽  
Band Noise ◽  
Kármán Vortex Street ◽  
Karman Vortex

scholarly journals von Kármán Vortex Street within an Impacting Drop

2012 ◽  
Vol 108 (26) ◽  
Author(s):  
Marie-Jean Thoraval ◽  
Kohsei Takehara ◽  
Takeharu Goji Etoh ◽  
Stéphane Popinet ◽  
Pascal Ray ◽  
...  
Keyword(s):  
Vortex Street ◽  
Karman Vortex Street ◽  
Von Karman ◽  
Von Karman Vortex Street ◽  
Kármán Vortex Street ◽  
Karman Vortex ◽  
Von Kármán

Use of Laser Doppler Vibrometry for Measuring Flow-Induced Vibration of a Thermowell in a Pipe Flow

2021 ◽  
Author(s):  
Sejong Chun ◽  
Sibok Lee ◽  
Hyewon Yoon
Keyword(s):  
Strain Rate ◽  
Laser Doppler ◽  
Vortex Street ◽  
Rate Measurement ◽  
Flow Induced Vibration ◽  
Laser Doppler Vibrometry ◽  
Karman Vortex Street ◽  
Kármán Vortex Street ◽  
Karman Vortex ◽  
Strain Rate Measurement

Abstract Thermowells with helical strakes are becoming promising to prevent them from fatigue fracture by Kármán vortex street. Many studies suggest various kinds of measurement techniques, including strain rate measurement, acceleration measurement, and high-speed visualization to evaluate the role of Kármán vortex street to the flow-induced vibration. Nevertheless, use of laser Doppler vibrometry has not yet been reported in the literature. This study compared the tip deflection of a thermowell due to the flow-induced vibration by using the laser Doppler vibrometry and the strain rate measurement. The laser Doppler vibrometry could measure the tip deflection directly. On the other hand, the strain rate measurement had to convert the strain rate into the tip deflection through the Euler-Bernoulli beam theory. Measurement equivalence between the laser Doppler vibrometry and the strain rate measurement was discussed with the results of tip deflections of the thermowell.

scholarly journals Kármán vortex street in a two-component Bose–Einstein condensate

2019 ◽  
Vol 21 (10) ◽  
pp. 103046
Author(s):  
Xiao-Lin Li ◽  
Xue-Ying Yang ◽  
Na Tang ◽  
Lin Song ◽  
Zhi-Kun Zhou ◽  
...  
Keyword(s):  
Einstein Condensate ◽  
Vortex Street ◽  
Karman Vortex Street ◽  
Bose Einstein Condensate ◽  
Two Component ◽  
Kármán Vortex Street ◽  
Karman Vortex ◽  
Bose Einstein
Sign in / Sign up

Export Citation Format

Share Document