A review of aeroacoustics of supersonic jets interacting with solid surfaces

Salehian, Saman; Mankbadi, Reda R.

doi:10.2514/6.2020-0006

Cited by 5 publications

(5 citation statements)

References 92 publications

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“…(6) Increasing the mass flow ratio or total temperature ratio significantly improves FNT choke performance; (7) The small expansion ratio nozzle may have greater choke performance.…”

Section: Thrust Adjustment By Fluid Throatmentioning

confidence: 99%

“…Choubey et al [6] comprehensively compiled the research progress of secondary jet application in scramjet engines. Salehian and others [7] provided a good review of active jet noise control in aerospace vehicles, highlighting the research progress in active secondary jet noise control. However, it can be seen from these reviews that most studies focus only on the characteristics of secondary jet in a single application, without considering its comprehensive performance in multiple applications.…”

Section: Introductionmentioning

confidence: 99%

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Research Progress on Active Secondary Jet Technology in Supersonic Flow Field of Aerospace Propulsion Systems

Zhu,

Guo,

Sun

et al. 2023

Fluids

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As humans continue to explore the aerospace field, higher demands have been placed on new types of propulsion systems. Meanwhile, active secondary flow has been applied to various aspects of engines over the past seventy years, significantly enhancing engine performance. For the new generation of propulsion systems, active secondary flow remains a highly promising technology. This article provides an overview of the application of active secondary flow in engines, including a review of the past research on the secondary jet flow field, and an introduction of the more prominent applications of the jet in engines and its research progress. Finally, the problems existing in the current application of the secondary jet are summarized, and the future direction of the research is anticipated.

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“…(6) Increasing the mass flow ratio or total temperature ratio significantly improves FNT choke performance; (7) The small expansion ratio nozzle may have greater choke performance.…”

Section: Thrust Adjustment By Fluid Throatmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research Progress on Active Secondary Jet Technology in Supersonic Flow Field of Aerospace Propulsion Systems

Zhu,

Guo,

Sun

et al. 2023

Fluids

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“…This interaction is discussed here with a focus on noise creation and reduction when a jet is parallel to or impinging on a solid wall. Various researchers have presented computational methods [65,66] with large-eddy simulations [67][68][69][70][71], high fidelity simulations [72] and 3D simulation [73]. The noise reduction of supersonic jets by nozzle trailing-edge changes was investigated experimentally [74], and hemispherical noise reduction reflectors on transonic jet flows [75] were conducted.…”

Section: Noise Controlmentioning

confidence: 99%

A Critical Review of Supersonic Flow Control for High-Speed Applications

2021

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In high-speed fluid dynamics, base pressure controls find many engineering applications, such as in the automobile and defense industries. Several studies have been reported on flow control with sudden expansion duct. Passive control was found to be more beneficial in the last four decades and is used in devices such as cavities, ribs, aerospikes, etc., but these need additional control mechanics and objects to control the flow. Therefore, in the last two decades, the active control method has been used via a microjet controller at the base region of the suddenly expanded duct of the convergent–divergent (CD) nozzle to control the flow, which was found to be a cost-efficient and energy-saving method. Hence, in this paper, a systemic literature review is conducted to investigate the research gap by reviewing the exhaustive work on the active control of high-speed aerodynamic flows from the nozzle as the major focus. Additionally, a basic idea about the nozzle and its configuration is discussed, and the passive control method for the control of flow, jet and noise are represented in order to investigate the existing contributions in supersonic speed applications. A critical review of the last two decades considering the challenges and limitations in this field is expressed. As a contribution, some major and minor gaps are introduced, and we plot the research trends in this field. As a result, this review can serve as guidance and an opportunity for scholars who want to use an active control approach via microjets for supersonic flow problems.

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“…Different noise reduction techniques for impinging jets can be found in the review articles of Jiang et al, 5 and Salehian and Mankbadi. 40 Thus, from a review of the literature on jet impingement noise reveals that studies on the effect of a porous plate are scarce. However, one can find the use of a porous coating to reduce aerodynamic drag and noise of circular cylinders, 41 especially vortex shedding noise 42 or trailing edge noise.…”

Section: Introduction and State Of The Artmentioning

confidence: 99%

“…Different noise reduction techniques for impinging jets can be found in the review articles of Jiang et al, 5 and Salehian and Mankbadi. 40…”

Section: Introduction and State Of The Artmentioning

confidence: 99%

Acoustic characteristics of jets impinging on permeable plates

Dhamanekar,

Srinivasan

2023

International Journal of Aeroacoustics

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This article explores the acoustic characteristics and the relevant flow features of jets impinging on permeable plates. Noise generated due to the interaction of the jet with permeable plates is compared with jets impinging on an impermeable plate and the corresponding free jet. This study systematically measures various parameters, including pore size, porosity, and pressure drop, to precisely quantify the permeability of the plates using the Forchheimer equation. The focus is on investigating the impact of permeability on noise reduction. An acoustic study is performed by carrying out blow-up and blow-down tests to find the effect of permeability at different nozzle pressure ratios and different nozzle-plate spacings. An extensive directivity study is conducted to find the directionality of acoustic emissions and calculate acoustic power. It is found that the overall sound pressure level is lower for the jets impinging on the permeable plates compared to the impermeable plates in subsonic cases. It is also observed that the insertion of the permeable plates in supersonic jets generates less noise compared to the corresponding free jet. It is found that most of the tones are absent in the case of permeable plates for supersonic jets, whereas the tones are present with lesser amplitude compared to jets impinging on impermeable plates for subsonic and transonic jets. Finally, flow measurement and flow visualization studies are carried out to understand the flow physics responsible for the noise variance. This study illuminates that the passage of flow through the porous plate results in the reduction of wall-jet velocities, thereby suppressing the turbulent mixing noise. The absence of shock oscillations in front of the permeable plate is identified as the cause of the mitigation of impinging tones.

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A review of aeroacoustics of supersonic jets interacting with solid surfaces

Cited by 5 publications

References 92 publications

Research Progress on Active Secondary Jet Technology in Supersonic Flow Field of Aerospace Propulsion Systems

Research Progress on Active Secondary Jet Technology in Supersonic Flow Field of Aerospace Propulsion Systems

A Critical Review of Supersonic Flow Control for High-Speed Applications

Acoustic characteristics of jets impinging on permeable plates

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