An Investigation of Separated Flows- Part I I :  Flow in the Cavity and Heat Transfer

Charwat, A. F.; Dewey, C. Forbes; Roos, J. N.; Hitz, J. A.

doi:10.2514/8.9099

Cited by 117 publications

(14 citation statements)

References 3 publications

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“…As discussed below, the coefficient in this region was evaluated by treating it as a rearward facing step in the entrance region of a pipe. In application to this heat transfer region, correlation (10) became identical to correlation (i) as modified by correlation (2) when f=1 and "='..…”

mentioning

confidence: 80%

Techniques for the Thermal/Hydraulic Analysis of LMFBR Check Valves

Cho¹,

Kane

1980

Journal of Engineering for Power

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A thermal/hydraulic analysis of the check valves in liquid sodium service for LMFBR plants is required to provide temperature data for thermal stress analysis of the valves for specified transient conditions. Because of the complex three-dimensional flow pattern within the valve, the heat transfer analysis techniques for less complicated shapes could not be used. This paper discusses the thermal analysis techniques used to assure that the valve stress analysis is conservative. These techniques include a method for evaluating the recirculating flow patterns and for selecting appropriately conservative heat transfer correlations in various regions of the valve.

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mentioning

confidence: 80%

Techniques for the Thermal/Hydraulic Analysis of LMFBR Check Valves

Cho¹,

Kane

1980

Journal of Engineering for Power

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“…Zero degree angle of attack continuum hypersonic flow drag data were used to evaluate the ballistic coefficient (B = 32.54 lb/ft ). Initial conditions used in the trajectory computations and results of the computations are shown in Figures 1,2,and 3. Six-Degree-of-Freedom Trajectories --The effect of Initial angular rates on the angle of attack convergence was determined by using the six-degree-of-freedom aerodynamic model of the SNAP-27 fuel cask without flap; two six-degree-of-freedom earth orbit decay trajectories were calculated to define the effect of the initial angular rate on the angle of attack convergence of the fuel cask. The initial conditions used were:…”

Section: Trajectory Analysesmentioning

confidence: 99%

Aerothermodynamic analysis of the SNAP-27 fuel cask

McAlees¹,

Klett²,

Pearce³

et al. 1966

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An aerothermodynamic analysis of the SNAP-27 LEM fuel cask is presented for each of three mission aborts. Aerodynamic models for point mass and six degree-offreedom trajectories are used, and the fuel cask heating rates and temperature responses are predicted for these trajectories. A survey of analytical and experimental studies of separated flow is related to the fuel cask, and a shock tunnel test program is outlined for further fuel cask analyses.

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“…According to him flow is unsteady if the pressure ratio across the oblique shock is such that the mass of the fluid reversed at the reattachment point does not balance the scavenged fluid from the separated region. Charwat et al (4) while studying the heat transfer effects in separated flows also observed that the model of mass exchange appeared to yield more accurate semi-empirical correlations of measurements. According to him, the separated region 'breathes' and during one half of pulse mass is injected into it while during the other half it is ejected out resulting into an unsteady mass exchange.…”

Section: Introductionmentioning

confidence: 99%

Study of unsteady characteristics of flare-induced hypersonic shock-wave boundary-layer interaction flowfield with variation in γ

Verma

2003

Aeronaut. j.

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Experimental work has been carried out to study the unsteady flow-field characteristics related to shock-wave/boundary-layer interaction. Tests were carried out on an axisymmetric configuration that has a semi-cone angle of 35° and a flare angle of 20°. Further influence of low γ gases (CO2 and CF4) on the overall interaction process is also investigated. Both surface and off-surface analysis has been carried out. Off-surface study has been made with a laser schlieren system. The purpose of this study was to investigate the source of the unsteadiness related to such interactions. Two types of shock motions, namely, flapping and rippling could be identified for air, the relative importance of each of which is strongly dependent on the location within the interaction and on the type of test gas. Spectral analysis shows the large-scale motion of the separation bubble to be the main source of high amplitude fluctuations. However, the existence of separation bubble itself does not necessarily indicate the prevalence of unsteady flow conditions.

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An Investigation of Separated Flows- Part I I : Flow in the Cavity and Heat Transfer

Cited by 117 publications

References 3 publications

Techniques for the Thermal/Hydraulic Analysis of LMFBR Check Valves

Techniques for the Thermal/Hydraulic Analysis of LMFBR Check Valves

Aerothermodynamic analysis of the SNAP-27 fuel cask

Study of unsteady characteristics of flare-induced hypersonic shock-wave boundary-layer interaction flowfield with variation in γ

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