TRIP trajectory integration program
Computer program with predictor-corrector numerical integration subroutine for fast trajectory analysis
Kaufman, B.↗
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Results for “computer programs”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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On generality and problem solving: A case study using the DENDRAL program
Computer program for inductive inference problems in organic chemistry
Feigenbaum, E. A.↗
Main tank injection pressurization program
Computer program predicts performance of fluorine-hydrogen main tank injection pressurization system for full range of liquid-hydrogen-fueled space vehicles. Analytical model includes provisions for heat transfer, injectant jet penetration, and ullage gas mixing. Analysis predicts GF2 usage, ullage gas and tank wall temperatures, and LH2 evaporation.
Cady, E. C.↗
Propulsion sizing program
Computer program was written to evaluate and define optimum design parameters of low pressure auxiliary propulsion system. APS will provide attitude and translational control of space shuttle vehicles. Program evaluates subsystem design parameters such as engine chamber pressure, mixture ratio, expansion ratio, and subsystem component weight and size.
Kaemming, T. A.↗
Three bit mass spectral search program
Computer program is developed to interpret spectral data in order to assist chemist in identifying low resolution mass spectra. Two versions of program, using approximately same amount of core are available. In both programs, core requirements are roughly proportional to maximum number of unknowns to be handled on each pass through tape.
Grotch, S. L.↗
Multiple-compartment venting program
Computer program solves time-dependent energy and state equations for gas reservoirs, using the solutions of conductor conservation equations as mass and energy rate changes to reservoirs.
Leblanc, L. P.↗
NECAP: NASA Energy-cost analysis program
Computer program evaluates design and operation of facilities in regard to building energy consumption.
Source record↗
Spherical-Bearing Analysis Program
Computer program SPHERBEAN, developed to predict thermomechanical performance characteristics of double-row spherical roller bearings over wide range of operating conditions. Analysis allows six degrees of freedom for each roller and three for each half of an optionally split cage. Program capabilities provide sufficient generality to allow detailed simulation of both high-speed and conventional bearing operation.
Kleckner, R. J.↗
Guidelines for development structured FORTRAN programs
Computer programming and coding standards were compiled to serve as guidelines for the uniform writing of FORTRAN 77 programs at NASA Langley. Software development philosophy, documentation, general coding conventions, and specific FORTRAN coding constraints are discussed.
Earnest, B. M.↗
Solution-Adaptive Program for Computing 2D/Axi Viscous Flow
A computer program solves the Navier- Stokes equations governing the flow of a viscous, compressible fluid in an axisymmetric or two-dimensional (2D) setting. To obtain solutions more accurate than those generated by prior such programs that utilize regular and/or fixed computational meshes, this program utilizes unstructured (that is, irregular triangular) computational meshes that are automatically adapted to solutions. The adaptation can refine to regions of high change in gradient or can be driven by a novel residual minimization technique. Starting from an initial mesh and a corresponding data structure, the adaptation of the mesh is controlled by use of minimization functional. Other improvements over prior such programs include the following: (1) Boundary conditions are imposed weakly; that is, following initial specification of solution values at boundary nodes, these values are relaxed in time by means of the same formulations as those used for interior nodes. (2) Eigenvalues are limited in order to suppress expansion shocks. (3) An upwind fluctuation-splitting distribution scheme applied to inviscid flux requires fewer operations and produces less artificial dissipation than does a finite-volume scheme, leading to greater accuracy of solutions.
Wood, William A.↗
A program for computer gridding of satellite photographs for mesoscale research
Computer program for gridding of satellite photographs using coordinate transformations of Fujita graphical method
COMPUTER PROGRAM↗
Programs for computing equilibrium thermodynamic properties of gases
Computer program for calculating equilibrium thermodynamic properties of diatomic gas mixtures
GAS MIXTURE↗
A program for computing satellite ground traces and vehicle-sun orientation
Computer program to find projection of satellite on surface of rotating earth and vehicle-sun orientation
SATELLITE↗
A FORTRAN program for computation of mass in earth orbit required for interplanetary missions
FORTRAN computer program for computing mass in earth orbit for round trip-stopover missions, flyby missions, and orbital missions with single-stage high-thrust system for each phase
Mascy, A. C.↗
NASKERN Program Tests Computers
Computer program, NASKERN developed to aid in evaluation of performances of supercomputers. Consists of seven test-kernel programs performing computations typical of supercomputer calculations. Written in FORTRAN 77.
Bailey, David H.↗
User's Manual for Aerofcn: a FORTRAN Program to Compute Aerodynamic Parameters
The computer program AeroFcn is discussed. AeroFcn is a utility program that computes the following aerodynamic parameters: geopotential altitude, Mach number, true velocity, dynamic pressure, calibrated airspeed, equivalent airspeed, impact pressure, total pressure, total temperature, Reynolds number, speed of sound, static density, static pressure, static temperature, coefficient of dynamic viscosity, kinematic viscosity, geometric altitude, and specific energy for a standard- or a modified standard-day atmosphere using compressible flow and normal shock relations. Any two parameters that define a unique flight condition are selected, and their values are entered interactively. The remaining parameters are computed, and the solutions are stored in an output file. Multiple cases can be run, and the multiple case solutions can be stored in another output file for plotting. Parameter units, the output format, and primary constants in the atmospheric and aerodynamic equations can also be changed.
Conley, Joseph L.↗
GYC: A program to compute the turbulent boundary layer on a rotating cone
A computer program, GYC, which is capable of computing the properties of a compressible turbulent boundary layer on a rotating axisymmetric cone-cylinder body, according to the principles of invariant modeling was studied. The program is extended to include the calculation of the turbulence scale by a differential equation. GYC is in operation on the CDC-7600 computer and has undergone several corrections and improvements as a result of the experience gained. The theoretical basis for the program and the method of implementation, as well as information on its operation are given.
Sullivan, R. D.↗
A general program to compute the multivariable stability margin for systems with parametric uncertainty
A computer program implementing an algorithm for computing the multivariable stability margin to check the robust stability of feedback systems with real parametric uncertainty is proposed. The authors present in some detail important aspects of the program. An example is presented using lateral directional control system.
Sanchez Pena, Ricardo S.↗