Transverse jet-cavity interactions with the influence of an impinging shock

Abstract

A copy can be downloaded for personal non-commercial research or study, without prior permission or chargeThe content must not be changed in any way or reproduced in any format or medium without the formal permission of the copyright holder(s) hold the flow and stabilise the combustion, is one mechanism which has attracted much attention, requiring further research to study the unsteady flow features and interactions occurring within the cavity. In this study we combine the transverse jet injection upstream of a cavity with an impinging shock to see how this interaction influences the cavity flow, since impinging shocks have been shown to enhance mixing of transverse jets. Utilising qualitative and quantitative methods:schlieren, oilflow, PIV, and PSP the induced flowfield is analysed. The impinging shock lifts the shear layer over the cavity and combined with the instabilities generated by the transverse jet creates a highly complicated flowfield with numerous vertical structures. The interaction between the oblique shock and the jet leads to a relatively uniform velocity distribution within the cavity. * Hossein.Zare-Behtash@glasgow.ac.uk

The flow feature of transverse hydrogen jet in presence of micro air jets in supersonic flow

“…In our previous studies, the influence of shock wave on the supersonic mixing in scramjet engines are simulated, and we observed that the impinging shock wave diminishes the penetration and enhances the mixing of the injectants irrespective of the molecular weights. Schetz et al [19] Zare-Behtash et al [20] observed similar results on this topic.…”

“…Although single transverse jet is considered as an efficient model for the injection of fuel in supersonic combustion chambers and scientists have been extensively focused [14][15][16][17][18][19][20][21][22][23][24][25], little works have been performed to reveal the main feature of the interaction between the transverse microjets of two different gases. Moreover, various studies focused on detailed perceptive in the vicinity of flow structure in a single jet-supersonic cross flow [19][20][21][22][23][24][25][26][27] and there is little work on the mixing of the combination of the micro fuel jet with micro air jets.…”

“…Moreover, various studies focused on detailed perceptive in the vicinity of flow structure in a single jet-supersonic cross flow [19][20][21][22][23][24][25][26][27] and there is little work on the mixing of the combination of the micro fuel jet with micro air jets. The flow structure of the two micro jets is illustrated in Fig.…”

Joule heating flow control methods for high-speed flows

“…Previous studies using different types of flow control [68][69][70] have shown this can produce promising results. There has been some interest in the application of LAFPA's to augment the shear layer resonance of supersonic cavity flows.…”

Mixing augmentation induced by the interaction between the oblique shock wave and a sonic hydrogen jet in supersonic flows

“…attention [20] [21] [22] [23] [24], and an enhanced mixing level can be achieved with an increased residence time when an incident shock wave impinges close to the transverse jet injection location [25]. Thus, it is necessary to evaluate the influence of the incident shock wave on the mixing process in the transverse injection flow field.…”