Delayed Detached-Eddy Simulation of Supersonic Inlet Buzz

Trapier, Simon; Deck, Sébastien; Duveau, Philippe; Guillen, Philippe

doi:10.2514/6.2007-4353

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…So far, many scholars have investigated the buzz or unstart mechanism by experiments or numerical analysis. Supersonic inlets are the first to be investigated experimentally 6,7,8 and numerically, 9–11 and its buzz mechanism is more or less clear. The buzz phenomenon in supersonic inlets may exhibit two different oscillatory phases, of similar frequencies but different amplitudes, called “little buzz” and “big buzz”.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling and characteristic analysis of scramjet buzz

Chang

Wang

Bao

2014

Proceedings of the Institution of Mechanical Engineers, Part G:

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Buzz is an important issue for a scramjet engine. A mathematical model of buzz oscillations is necessary for control system design. Control-oriented models of hypersonic vehicle propulsion systems require a reduced-order model that is accurate to some extent but requires less than a few seconds of computational time. To achieve this goal, a reducedorder model of buzz oscillations for a scramjet engine is built by introducing the modeling idea of Moore-Greitzed model for compressors. The introduction of characteristic lines avoids the complex interactions in hypersonic inlet, such as shock-shock interactions and shock-boundary layer interaction. And the inlet characteristics are obtained from the pressure signal of combustor. Based on the established buzz model, we can predict the inlet performance, characterize the stability margin of inlet, reflect the oscillatory characteristics of inlet buzz including the dominant amplitude and frequency and describe the transition process of inlet buzz.

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Section: Introductionmentioning

confidence: 99%

Mathematical modeling and characteristic analysis of scramjet buzz

Chang

Wang

Bao

2014

Proceedings of the Institution of Mechanical Engineers, Part G:

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Section: Introductionmentioning

confidence: 99%

“…4 The occurrence of buzz may have undesirable effects on propulsion system, such as combustion instability or turnoff, engine surge, and significant thrust loss that all can lead to deteriorating resutls. 5 Therefore, this dangerous condition is highly attempted to be avoided. 6 Even though some numerical studies have also been performed on buzz, [7][8][9] but due to its complexity, its physics has been mostly investigated by means of experimental tests.…”

Section: Introductionmentioning

confidence: 99%

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Study of buzz phenomenon using visualization of external shock structure

Farahani

Jaberi

2018

Proceedings of the Institution of Mechanical Engineers, Part G:

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An experimental study was carried out on an axisymmetric supersonic inlet with external compression in order to investigate the buzz phenomenon at different angles of attack and mass flow rates. The model was equipped with accurate and high-frequency pressure sensors, and the tests were conducted at Mach numbers varying from 1.8 to 2.5, for various angles of attack. Shadowgraph visualization technique, together with a high-speed camera, was used to provide the visual description of the shock structure in front of the inlet and to study the characteristics of buzz. Furthermore, pressure distribution over the spike surface was measured using several pressure sensors. Frequency of the buzz and shock displacement were measured by inspection of visualization pictures in each test. The obtained data from shadowgraphs were compared with those obtained from pressure measurements, and good agreement was found between them. The results revealed that for a moderate value of mass flow rate, the frequency of shock oscillation decreases as Mach number increases. Further, by increasing angle of attack, the shock displacement of oscillation will increase. At non-zero angles of attack, the displacement and frequency of shock motion show different behaviors on the leeward and windward sides of the body.

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Shock wave bifurcation in convergent–divergent channels of rectangular cross section

Kuzmin

2016

Shock Waves

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Delayed Detached-Eddy Simulation of Supersonic Inlet Buzz

Cited by 6 publications

References 10 publications

Mathematical modeling and characteristic analysis of scramjet buzz

Mathematical modeling and characteristic analysis of scramjet buzz

Study of buzz phenomenon using visualization of external shock structure

Shock wave bifurcation in convergent–divergent channels of rectangular cross section

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