GRASP - A general radiation simulation program

Liu, J.; Shang, H. M.; Chen, Y. S.; Wang, T. S.

doi:10.2514/6.1997-2559

Cited by 10 publications

(3 citation statements)

References 14 publications

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“…Two computational methodologies are used to perform the computational heat transfer analysis: the nite differenceNavier-Stokes (FDNS) computational uid dynamics(CFD) code 8,9 for the convective heating and the general radiation solution program (GRASP) 10 for the radiative heating. These tools have been developed at NASA Marshall Space Flight Center (MSFC) and are continuously being improved by MSFC personnel and its support contractors.…”

Section: Thermal Environment Computationmentioning

confidence: 99%

Effect of Fence on Linear Aerospike Plume-Induced Base-Heating Physics

Wang

2000

Journal of Thermophysics and Heat Transfer

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A computational heat transfer analysis is conducted to study the effect of the presence of an engine fence on the X-33 linear aerospike plume-induced base heating during vehicle ascent. A fence is an extension of the plug side wall that reduces the plume spillage. A detailed three-dimensional thermo ow eld of the entire vehicle is computed such that an accurate freestream ow environment is assured for the base-ow development. The computational methodology is based on a nite difference, viscous ow, chemically reacting, pressure-based computational uid dynamics formulation and a nite volume, spectral-line-based weighted sum of gray gases absorption computational radiation heat transfer formulation. The computed base-ow physics are analyzed and compared with those of a subscale model hot-ow test. The effect of base bleed is also analyzed. Nomenclatureturbulence modeling constants: 1.15, 1.9, 0.25, and 0.09, respectively G = geometrical metrices H = total enthalpy h = static enthalpy or altitude, km I = radiative intensity J = Jacobian of coordinate transformation K = forward rate constant k = turbulent kinetic energy M = Mach number N = total number of chemical species P = pressure PC = combustion chamber pressure Pr = Prandtl number Q = heat ux, kW/m 2 q = 1, u, v, w , H, k, e , or q i R = recovery factor r = location coordinate S q = source term for equation q T + = law of the wall temperature t = time, s U = volume-weighted contravariant velocity u, v, w = mean velocities in three directions u s = wall friction velocity u += law of the wall velocity, u / u s x, y, z = coordinate or distance y + = law of the wall distance, (y p u s q / l ) e = turbulent kinetic energy dissipation rate or wall emissivity j = absorption coef cient l = effective viscosity, l 1 + l t n = computational coordinates P = turbulent kinetic energy production q = density r q = turbulence modeling constants } = energy dissipation function Presented as Paper 99-3682 at the AIAA 33rd Thermophysics ConferenceGroup; Ten-see.Wang@ msfc.nasa.gov. Senior Member AIAA. X= direction vector x = chemical species production rate Subscripts a = ambient b = blackbody or base c = convective or center l = laminar ow p = off-wall (wall function) point r = radiative t = turbulent ow w = wall surface 0 = reference 1 = freestream

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Section: Thermal Environment Computationmentioning

confidence: 99%

Effect of Fence on Linear Aerospike Plume-Induced Base-Heating Physics

Wang

2000

Journal of Thermophysics and Heat Transfer

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“…Thermal environmentsolutionsabout the X-33 base-heatingenvironment are carried out with two computationaltools: the nite differenceNavier-Stokes (FDNS) computational uid dynamics code 5 for the convectiveheatingand the generalradiationsolutionprogram (GRASP) 6 for the radiative heating. These tools were developed at Marshall Space Flight Center (MSFC) and are continuously being improved by MSFC personnel and its supporting contractors.…”

Section: Thermal Environment Computationmentioning

confidence: 99%

Analysis of Linear Aerospike Plume-Induced X-33 Base-Heating Environment

Wang

1999

Journal of Spacecraft and Rockets

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“…Burt and Boyd [12] [13] simulated the gas-particles multiphase flow of the vacuum plume using the direct Monte Carlo method. Liu and Shang [14] developed the code GRASP for radiation transfer calculation in exhaust plume using discrete ordinates method. However, the radiative transfer calculation methods discussed above are based on results of plume field calculations, which means that the radiative transfer calculations and the plume field calculations are carried out separately.…”

Section: Introductionmentioning

confidence: 99%

Infrared Radiation Signature of Exhaust Plume from Solid Propellants of Different Energy Characteristics

Wang¹,

Wei²,

Zhang³

et al. 2011

47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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The infrared radiation signature of the plume from the solid propellants of different energy characteristics is not the same. Three kinds of double-base propellants of different energy characteristics were chosen to test the infrared spectral radiance from 1000 cm -1 to 4500 cm -1 of their plume. The radiative spectrum was obtained in the tests. The experimental results indicate that the infrared radiation of the plume is basically determined by the energy characteristic of the propellant. The radiative transfer calculation models for the exhaust plume from the solid propellants were established By inducing the chemistry reaction source term and the radiation source term into the energy equation, the plume field and the radiative transfer were solved in a coupling way. The calculated results were consistent with the experimental data, so the reliability of the calculation models was conformed. The temperature distribution and the extent of the afterburning of the plume are distinct for the propellants of different energy characteristics, therefore the radiation of the plume varied with the propellants. The temperature of the fluid cell in the plume will increase or decrease to some extent by the influence of the radiation source term. NomenclatureI λ = spectral radiance I = radiation intensity E = radiative illumination/energy of the fluid θ = zenith angle φ = azimuth angle ρ = density of the fluid T = temperature of the fluid v = velocity of the fluid p = pressure of the fluid 1 Ph. D Student, 2 S c = chemistry source term S r = radiation source term

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GRASP - A general radiation simulation program

Cited by 10 publications

References 14 publications

Effect of Fence on Linear Aerospike Plume-Induced Base-Heating Physics

Effect of Fence on Linear Aerospike Plume-Induced Base-Heating Physics

Analysis of Linear Aerospike Plume-Induced X-33 Base-Heating Environment

Infrared Radiation Signature of Exhaust Plume from Solid Propellants of Different Energy Characteristics

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