Development of a biowaste resistojet

Halbach, C. R.; Yoshida, R. Y.

doi:10.2514/3.30259

Cited by 5 publications

(1 citation statement)

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“…If gas final = //gas initial + /'gas/'W (6) The gas temperature corresponding to the enthalpy is obtained from a Mollier table or chart, and is believed to be accurate to within ±3%. During thruster tests, a pyrometer sighting was made along the center line through the expansion bellows assembly (see Fig.…”

Section: Description Of Experimentsmentioning

confidence: 99%

Viscous Effects on Biowaste Resistojet Nozzle Performance

Kallis¹,

Goodman²,

Halbach³

1972

Journal of Spacecraft and Rockets

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AND CARL R. HALBACHÂdvanced Rocket Technology (ARTCOR), Irvine, Calif.Viscous effects on the performance of biowaste resistojet microthrusters are calculated using Rae's numerica method for low-Reynolds number flow in a nozzle. Results are presented for a 25-mlb thruster suitable for space station attitude control using CO 2 , CH 4 , and H 2 O as propellants. Nozzle exit plane data (such as Mach number, velocity, and temperature profiles) useful for computations of plume contamination are also presented. The performance predictions are compared with experimental data which were available from laboratory firings of a 10-mlb thruster having a trumpet-shaped nozzle with CO 2 , CH 4 , H 2 O and H 2 as propellants. Nomenclature B= Reynolds number [see Eq.(specific enthalpy I sp = specific impulse M<£ = centerline Mach number MW = molecular weight m = mass flow rate P = power Pr = Prandtl number p = pressure R = universal gas constant r = radial coordinate, measured from nozzle axis r*,r w = nozzle throat, local nozzle radius T = temperature u = velocity x -z/r* z = axial coordinate, measured from nozzle throat y = specific-heat ratio A V = velocity increment 8 L = boundary-layer displacement thickness € = nozzle area ratio r] = r/r w or over all total power efficiency 61 = nozzle inlet convergence half angle (see Fig. 4) IJL = viscosity p = density co = exponent in the relation p.oc T 03 Subscript ( ) 0 = conditions in chamber, i.e., downstream end of heater Presented as Paper 72-450 at the

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Section: Description Of Experimentsmentioning

confidence: 99%