Transition control in a flat-plate boundary layer

被引：0

作者：

Izawa, S ^{[1
]}

Sakai, T ^{[1
]}

Inasawa, A ^{[1
]}

Xiong, AK ^{[1
]}

Fukunishi, Y ^{[1
]}

机构：

[1] Tohoku Univ, Sendai, Miyagi 980, Japan

来源：

SIXTH IUTAM SYMPOSIUM ON LAMINAR-TURBULENT TRANSITION | 2006年 / 78卷

关键词：

transition; boundary layer; active control; feedback; piezo actuator;

D O I：

暂无

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A semi-automatic and active control of T-S waves and oblique waves is performed using an array of piezo-ceramic actuators attached on a flat-plate surface. The actuators generate counter waves to cancel the incoming instability waves. The actuator's operating amplitudes and phases are successively updated using the velocity fluctuations monitored downstream by a rake of hotwires. It is shown that the system could weaken these waves when their sweep angles are less than 15 degrees. However, it has difficulty in controlling the waves of large sweep angles. Through the results from the experiment activating only one actuator, it is shown that the difficulty arises because the wave front of the waves generated by each actuator deforms into an arch.

引用

页码：207 / +

页数：2

共 6 条

[1]

FUKUNISHI Y, 2004, IN PRESS FLUID DYN R

[2] Control of turbulent boundary layers [J].