2018
DOI: 10.1007/bf03404769
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Frozen Sonic Flow Method Applied to Arc-Heated Facilities for Planetary Re-Entry Simulation

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Cited by 4 publications
(4 citation statements)
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“…Although this quantity can be easily measured in arc-jet facilities, however, the centerline total enthalpy plays a much more important role in arc-jet simulation, because it is at the flow centerline that test articles are typically located during effective tests. In this regard, the so-called Frozen Sonic Flow (FSF) method, developed by Jorgensen [27] and adapted by Pope [28] for low density arc-heated flows, is particularly efficient because it can accurately evaluate the centerline total enthalpy relying on a few flow measurements and a simple physical model of the overall fluid-dynamic process; the reader is referred to [29] for a detailed description of the method and the related underlying assumptions. For a chemically frozen mixture of atomic and diatomic species with frozen vibrational energy, such as a nitrogen-hydrogen mixture, application of the FSF method is a relatively straightforward practice (see, e.g., Figure 11 for the value of centerline total enthalpy H ah as a function of the nozzle-exit total enthalpy H n ; it can be seen that the related ratio is about 1.6, quite constant with respect to the total mass flow rate and the percentage of hydrogen).…”
Section: Aero-thermochemical Model Of the Overall Flow Processmentioning
confidence: 99%
“…Although this quantity can be easily measured in arc-jet facilities, however, the centerline total enthalpy plays a much more important role in arc-jet simulation, because it is at the flow centerline that test articles are typically located during effective tests. In this regard, the so-called Frozen Sonic Flow (FSF) method, developed by Jorgensen [27] and adapted by Pope [28] for low density arc-heated flows, is particularly efficient because it can accurately evaluate the centerline total enthalpy relying on a few flow measurements and a simple physical model of the overall fluid-dynamic process; the reader is referred to [29] for a detailed description of the method and the related underlying assumptions. For a chemically frozen mixture of atomic and diatomic species with frozen vibrational energy, such as a nitrogen-hydrogen mixture, application of the FSF method is a relatively straightforward practice (see, e.g., Figure 11 for the value of centerline total enthalpy H ah as a function of the nozzle-exit total enthalpy H n ; it can be seen that the related ratio is about 1.6, quite constant with respect to the total mass flow rate and the percentage of hydrogen).…”
Section: Aero-thermochemical Model Of the Overall Flow Processmentioning
confidence: 99%
“…10a, is a high enthalpy supersonic flow facility. It has enjoyed a widespread use over the last 30 years for the simulation of various planetary re-entry conditions ( [17][18][19][20][21]).…”
Section: New Heat Flux Sourcementioning
confidence: 99%
“…The test campaign has been based on the arc-jet facility SPES (Small Planetary Entry Simulator) Esposito and Aponte [22] (Fig. 1a).…”
Section: A the Small Planetary Entry Simulatormentioning
confidence: 99%
“…As the interplay between experimental measurements and analytic arguments has been particularly fruitful, new efforts have recently been devoted to explore the response of these methods in circumstances for which their pre-requisites were thought not to be valid or weak. An example along these lines is represented by the recent attempt by Esposito and Aponte [22] to extend the frozen sonic point technique to polyatomic molecules gas mixtures. These efforts and synergy with experimental work have led over the years to the establishment of a common, elegant theoretical framework based on the original theory for di-atomic molecules elaborated by Vincenti and Kruger [23] and Chapman and Cowling [24].…”
Section: Introductionmentioning
confidence: 99%