The Response of Artificial Longitudinal Vortex Pair Embedded in the Boundary Layer to Acoustic Excitation
スポンサーリンク
概要
- 論文の詳細を見る
As a flow model for so-called "secondary instability" in a three-dimensional boundary layer, a flat plate boundary layer with artificially generated embedded streamwise vortices embedded in it is examined using a hot-wire anemometer and flow visualization in order to determine the onset conditions of the secondary instabiliy and its response to acoustic excitation. The results show that the nondimensional parameter, with which the onset conditions of the secondary instability can be predicted, is the product of critical inflection point height and inverse of maximum shear at critical conditions. Transition seems to start when this value reaches about 0. 2. Acoustic disturbance seems to excite the secondary instability at certain conditions. Direct response to the disturbance frequency was observed within a frequency range of 290Hz-450Hz. Below 280Hz, the spectral peak of velocity fluctuation was held constant at 345Hz.
- 一般社団法人日本機械学会の論文
- 1993-02-15
著者
-
Wang Tsung-jung
Tohoku University Graduate School The Institute Of Fluid Science
-
Kohama Yasuaki
Department of Machine Intelligence and Systems Engineering, Tohoku University
-
Fukunishi Yu
Department of Machine Intelligence and Systems Engineering, Tohoku University
-
Fukunishi Yu
Department Of Machine Intelligence And Systems Engineering Graduate School Of Engineering Tohoku Uni
-
Kohama Yasuaki
Department Of Machine Intelligence And Systems Engineering Tohoku University
関連論文
- The Response of Artificial Longitudinal Vortex Pair Embedded in the Boundary Layer to Acoustic Excitation
- Study on the flow structure at the spanwise edge of spreading turbulent region and its control
- Sound Suppression of Laminar Separating Flow over Cavity(Jets, Wakes and Separated Flows)
- Artificial Control of the Three-Dimensionalization Process of T-S Waves in Boundary-Layer Transition
- Stability Analysis of Boundary Layer on a Sphere Rotating in Still Fluid
- SOUND SUPPRESSION OF A LAMINAR SEPARATING FLOW OVER A CAVITY(Cavity Flow and Pulsating Flow)
- Interaction Between Boundary-Layer Transition and Cavitation Phenomena on a Yawed Cylinder
- A New Parameter for Predicting Crossflow Instability
- Streamwise Interfaces of an Isolated Turbulent Region in a Laminar Boundary Layer
- Mixing Enhancement and Interface Characteristics in a Small-Scale Channel
- Numerical Study on Leading-Edge Receptivity to Freestream Vertical Vorticity