Propulsion Parameters of Noble-Abel Gases

Costa, F. P.

doi:10.26678/abcm.cobem2017.cob17-0235

Cited by 1 publication

(2 citation statements)

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“…The previous analytical solutions can be simplified in special cases. The critical flow constant and characteristic velocity of a thermally perfect NA gas [22] are calculated, respectively, by…”

Section: Simplified Solutionsmentioning

confidence: 99%

“…Ding et al [21] have adopted equations of state based on the Helmholtz energy to describe the flow of hydrogen through a critical nozzle and compared theoretical results with experimental data and CFD simulations with different equations of state. Costa [22] has investigated propulsion parameters of Noble-Abel gases and verified that covolume and variation of specific heats with temperature can influence significantly the propulsion parameters, depending on the pressures and temperatures considered.…”

Section: Introductionmentioning

confidence: 99%

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Propulsion and Thermodynamic Parameters of van der Waals Gases in Rocket Nozzles

Costa

Fischer

2019

International Journal of Aerospace Engineering

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Propellants or combustion products can reach high pressures and temperatures in advanced or conventional propulsion systems. Variations in flow properties and the effects of real gases along a nozzle can become significant and influence the calculation of propulsion and thermodynamic parameters used in performance analysis and design of rockets. This work derives new analytical solutions for propulsion parameters, considering gases obeying the van der Waals equation of state with specific heats varying with pressure and temperature. Steady isentropic one-dimensional flows through a nozzle are assumed for the determination of specific impulse, characteristic velocity, thrust coefficient, critical flow constant, and exit and throat flow properties of He, H2, N2, H2O, and CO2 gases. Errors of ideal gas solutions for calorically perfect and thermally perfect gases are determined with respect to van der Waals gases, for chamber temperatures varying from 1000 to 4000 K and chamber pressures from 5 to 35 MPa. The effects of covolumes and intermolecular attraction forces on flow and propulsion parameters are analyzed.

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Section: Simplified Solutionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%