Experimental Studies of Open Cavity Configurations at Transonic Speeds with Flow Control

Lada, C.; Kontis, Konstantinos

doi:10.2514/1.c031174

Cited by 12 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A cavity model enhances the fuel-air mixing and flame holding properties of scramjet engines [7][8][9][10][11][12][13][14][15][16][17]. Yu et al [18] has shown that a cavity model can induce faster mixing and a high combustion pressure, although the combustion performance depends on the cavity configuration.…”

Section: Introductionmentioning

confidence: 99%

Effects of dual jets distance on mixing characteristics and flow path within a cavity in supersonic crossflow

Ukai

Zare‐Behtash

et al. 2014

International Journal of Heat and Fluid Flow

View full text Add to dashboard Cite

Abstract:A rectangular open cavity with upstream dual injectors at a freestream Mach number of 1.9 was investigated experimentally. To evaluate the effect of the distance between the jets, the flow characteristics were investigated using the high-speed schlieren photography, particle image velocimetry, and surface oil flow techniques. The dual jet distances of 18 and 54 mm were used.Unstable flow occurs over the cavity in all cases and is not improved by changing the distance between the dual jets. Although the distance between the dual jets does not influence the flow stability, the flow field varies decidedly depending on the dual jets distance. The enhancement of air mixing depends on the distance between the jets. A long dual jets distance was found to yield better mixing characteristics within the cavity than a short one. When the jets are further apart, the mainstream between two counter-rotating vortex pairs behind the jets flows strongly into the cavity because of the increased blow-down occurring between the vortex pairs. Additionally, a counterflow with a low velocity magnitude occurs behind the jets. Hence, mixing is enhanced within the cavity by effects of the opposed flow. When the jet pairs are closer to each other, the counter-rotating vortex pairs are in contact; as a result, the blow-down effect does not occur between them. The flow drawn into the cavity from the mainstream is supplied from the sides of the test section into the cavity.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of dual jets distance on mixing characteristics and flow path within a cavity in supersonic crossflow

Ukai

Zare‐Behtash

et al. 2014

International Journal of Heat and Fluid Flow

View full text Add to dashboard Cite

show abstract

“…An asymmetric flow pattern inside the cavity was observed [8]. Lada & Kontis [9] showed the yaw angle either disturbs the shear layer or changes the flow type, resulting in attenuation of self-sustained oscillations. The incoming boundary layer thickness to depth ratio, / H δ , is another critical parameter.…”

Section: Introductionmentioning

confidence: 99%

Self Sustained Oscillations for Square Cavities at Yaw

Chung¹

2017

AAOAJ

View full text Add to dashboard Cite

An experimental study was conducted to determine the characteristics for a compressible turbulent flow over square cavities at yaw. Flush-mounted dynamic pressure transducers for mean and fluctuating pressure measurements were installed along the chordwise direction. The self-sustained oscillation phenomenon was examined by spectral density function. For a fixed yaw angle, the ratio of the incoming boundary layer thickness to the depth of the cavity has an evident influence near the rear corner of cavity, including the trailing-edge expansion and the maximum pressure fluctuations.

show abstract

Scale effects on the performance of sawtooth spoilers in transonic rectangular cavity flow

2015

View full text Add to dashboard Cite

Experimental Studies of Open Cavity Configurations at Transonic Speeds with Flow Control

Cited by 12 publications

References 4 publications

Effects of dual jets distance on mixing characteristics and flow path within a cavity in supersonic crossflow

Effects of dual jets distance on mixing characteristics and flow path within a cavity in supersonic crossflow

Self Sustained Oscillations for Square Cavities at Yaw

Scale effects on the performance of sawtooth spoilers in transonic rectangular cavity flow

Contact Info

Product

Resources

About