Passive Control Techniques to Alleviate Supersonic Cavity Flow Oscillation

2008 ◽  
Vol 24 (4) ◽  
pp. 697-703 ◽  
Author(s):  
Youngki Lee ◽  
Minsung Kang ◽  
Heuydong Kim ◽  
Toshiaki Setoguchi
Keyword(s):  
Passive Control ◽  
Cavity Flow ◽  
Flow Oscillation ◽  
Control Techniques ◽  
Supersonic Cavity

scholarly journals Effects of Active and Passive Control Techniques on Mach 1.5 Cavity Flow Dynamics

2017 ◽  
Vol 2017 ◽  
pp. 1-24
Author(s):  
Selin Aradag ◽  
Kubra Asena Gelisli ◽  
Elcin Ceren Yaldir
Keyword(s):  
Passive Control ◽  
Control Method ◽  
Pressure Fluctuations ◽  
Leading Edge ◽  
Cavity Flow ◽  
Flow Dynamics ◽  
Cover Plate ◽  
Control Methods ◽  
Trailing Edge ◽  
Control Techniques

Supersonic flow over cavities has been of interest since 1960s because cavities represent the bomb bays of aircraft. The flow is transient, turbulent, and complicated. Pressure fluctuations inside the cavity can impede successful weapon release. The objective of this study is to use active and passive control methods on supersonic cavity flow numerically to decrease or eliminate pressure oscillations. Jet blowing at several locations on the front and aft walls of the cavity configuration is used as an active control method. Several techniques are used for passive control including using a cover plate to separate the flow dynamics inside and outside of the cavity, trailing edge wall modifications, such as inclination of the trailing edge, and providing curvature to the trailing edge wall. The results of active and passive control techniques are compared with the baseline case in terms of pressure fluctuations, sound pressure levels at the leading edge, trailing edge walls, and cavity floor and in terms of formation of the flow structures and the results are presented. It is observed from the results that modification of the trailing edge wall is the most effective of the control methods tested leading to up to 40 dB reductions in cavity tones.

416 Passive Control of Supersonic Cavity Flow Using Sub-Cavity(2)

2007 ◽  
Vol 2007 (0) ◽  
pp. _416-1_-_416-4_
Author(s):  
Shigeru MATSUO ◽  
Kenbu TERAMOTO ◽  
Shinya NAKANO ◽  
Toshiaki SETOGUCHI
Keyword(s):  
Passive Control ◽  
Cavity Flow ◽  
Supersonic Cavity

416 Passive Control of Supersonic Cavity Flow Using Sub-Cavity(1)

2007 ◽  
Vol 2007 (0) ◽  
pp. _416-a_
Author(s):  
Shigeru MATSUO ◽  
Kenbu TERAMOTO ◽  
Shinya NAKANO ◽  
Toshiaki SETOGUCHI
Keyword(s):  
Passive Control ◽  
Cavity Flow ◽  
Supersonic Cavity

A Comparative Study of Mass Based Vibration Dampers

2017 ◽  
Author(s):  
Mohamed Gharib ◽  
Mansour Karkoub
Keyword(s):  
Comparative Study ◽  
Passive Control ◽  
Initial Conditions ◽  
Free Vibrations ◽  
Decay Rates ◽  
Coupled Systems ◽  
Primary System ◽  
Operating Personnel ◽  
Control Techniques ◽  
Dynamic Structures

Undesired vibrations in structures, buildings, and machines lead to reduction in the life of the system and greatly affects the safety of the occupying or operating personnel. In addition, economic and time losses could result from needed repairs or reconstruction. Many control techniques, active and passive, have been devised over the years to reduce/eliminate the vibrations in the aforementioned systems. Passive vibration control techniques are favorable over the active ones due to their simplicity, ease of implementation, cost, and power consumption. In dynamic structures, such as large buildings, passive control techniques are favored over their active counterparts. The most common types of passive control devices are tuned mass and impact dampers. The advocates of each of these devices boasts advantages of the others; however, there have been no systematic studies to compare and quantify the effectiveness of each of these types of devices as well as their suitability for specific applications. In this paper, a comparative study between the tuned mass dampers and impact dampers is conducted. A one-story structure is used to show the effectiveness of each of these devices in absorbing the vibrations of the structure. The coupled systems are modeled and simulated under free vibrations. The time responses are acquired using the same geometric parameters, excitation, and initial conditions. The comparisons are based on the settling time and amplitude decay rates of the primary system using each damper type. The numerical results show that both dampers can produce similar dampening effects if the parameters are optimized; however, correlating the dampers parameters is a challenging problem in the field of vibration and control.

Control of Pressure Oscillations Induced by Supersonic Cavity Flow

AIAA Journal ◽  
2020 ◽  
Vol 58 (5) ◽  
pp. 2070-2077 ◽  
Author(s):  
Wang Xiansheng ◽  
Yang Dangguo ◽  
Liu Jun ◽  
Zhou Fangqi
Keyword(s):  
Cavity Flow ◽  
Pressure Oscillations ◽  
Supersonic Cavity

Effects of a Cavity Flow Passive Control on Optical Phase Degradations

2005 ◽  
Author(s):  
R. Deron ◽  
H. Illy ◽  
P. Geffroy ◽  
F. Mendez ◽  
B. Corbel
Keyword(s):  
Passive Control ◽  
Cavity Flow ◽  
Optical Phase

Conservation of a slender historical Mamluk-style minaret by passive control techniques

2005 ◽  
Vol 12 (2) ◽  
pp. 157-177 ◽  
Author(s):  
A. G. El-Attar ◽  
A. M. Saleh ◽  
A. H. Zaghw
Keyword(s):  
Passive Control ◽  
Control Techniques
Sign in / Sign up

Export Citation Format

Share Document