Modes of shock wave oscillations on spike-tipped bodies

Calarese, Wladimiro; Hankey, W. L.

doi:10.2514/6.1983-544

Cited by 14 publications

(35 citation statements)

References 5 publications

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“…Also, limiting the pressure measurements to points on the body surface meant, that no quantitative data was available on the supposed key elements of the driving mechanisms, e.g. the foreshockaftershock intersection and the shear layer* 12 - 13 '.…”

Section: Pressure Probementioning

confidence: 99%

“…For the pulsation mode, Panaras'* 16 ' and Antonov's< 17 > independently established theories were accepted, stating that an influx to the separated region takes place due to the flow features arising in the vicinity of the foreshockaftershock intersection. Demetriades* 18 ' and Calarese and Hankey* 13 ' dealt with the shock asymmetries observed in axisymmetric flow conditions, suggesting that three-dimensional rotational waves could exist along the spike within the separated region. However, not all elements of these theories could be confirmed by analytical or experimental means, hence they remained hypotheses only.…”

Section: Pressure Probementioning

confidence: 99%

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Utilising CFD in the investigation of high-speed unsteady spiked body flows

Feszty¹,

Badcock²,

Richards³

2002

Aeronaut. j.

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Unsteady spiked body flows were simulated by a second order time-accurate CFD method. Laminar, axisymmetric flow was considered at Mach 2.21 and Mach 6 freestreams and Reynolds’ numbers based on the blunt body diameter of 0.12 million and 0.13 million, respectively. A spiked forward facing cylinder with spike lengths between LID = 1.00 and LID = 2.40 was used as the model geometry. Following the numerical method’s verification, the individual flow modes of oscillation and pulsation were examined. The frequency of the events was found in good agreement with the experiment, while the pressure amplitudes were overpredicted in the Mach 6 cases. Analysis of the numerical results showed that the oscillation flow mode was driven by a viscous mechanism, whereas the pulsation by an inviscid one. The hysteresis phenomenon in the transition between the two flow modes was predicted qualitatively.

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Section: Pressure Probementioning

confidence: 99%

Section: Pressure Probementioning

confidence: 99%

Utilising CFD in the investigation of high-speed unsteady spiked body flows

Feszty¹,

Badcock²,

Richards³

2002

Aeronaut. j.

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“…Reding et al considered unsteady aerodynamics for a spiked drag reduction device based on structure deflection coupled with thermal expansion caused by aerodynamic heating [9]. Calarese and Hankey experimentally and numerically studied shockwave oscillation modes on a spiked body at Mach 3, observing both symmetrical and asymmetrical oscillations that demonstrated and confirmed the existence of standing rotational waves and their corresponding effects [10]. A study by Hutt and Howe first considered the preliminary optimization design of vehicle configuration, in which the effects of spikes on bodies with different cross sections were compared by measuring force coefficients and the pressure center in a supersonic wind tunnel [11].…”

Section: Introductionmentioning

confidence: 99%

Hypersonic Flow Field Reconfiguration and Drag Reduction of Blunt Body with Spikes and Sideward Jets

Han

Jiang

2018

International Journal of Aerospace Engineering

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Flow field reconfiguration and drag reduction have been investigated by numerically solving Navier-Stokes equations, with the 2nd order dispersion controlled dissipative scheme adopted for the convective term discretion and the 2nd order central difference scheme for viscous term. Spikes and sideward jets nearby the spike noses were set up in the front of the blunt body to reconfigure the flow field and reduce drag during hypersonic flight. The spikes and the sideward jets led to the formation of the conical shock, the reattached shock, and the circumfluence, instead of a bow shock. According to the quantitative analysis, the reconfiguration of the flow field played a dominant role in drag reduction. Basing on the locations of the reattached shock and its interaction with the conical shock, a combined parameter was proposed for a primary criterion to design the spiked bodies with sideward jets for the purpose of drag reduction.

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“…2. The literature review reveals that addresses the mechanism how the unstable flow is initiated and how it persists [19] - [20]. The combination of the numerical simulations with experimental investigations has found to be a powerful tool to analyze unsteady flow and first results of a renewed investigation of the aerospike problem.…”

Section: Introductionmentioning

confidence: 99%

Unsteady Flowfield Characteristics Over Blunt Bodies at High Speed

Mehta¹

2014

Computational and Numerical Simulations

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Modes of shock wave oscillations on spike-tipped bodies

Cited by 14 publications

References 5 publications

Utilising CFD in the investigation of high-speed unsteady spiked body flows

Utilising CFD in the investigation of high-speed unsteady spiked body flows

Hypersonic Flow Field Reconfiguration and Drag Reduction of Blunt Body with Spikes and Sideward Jets

Unsteady Flowfield Characteristics Over Blunt Bodies at High Speed

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