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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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Shielded, tubular flow calorimeter operated by valve position measures characteristics of a hot gas stream of unknown composition. Measurements of mass flow density and total heat content per unit mass, total heat content per unit mass only, and pitot pressure are made.
Specific heat of extended molecular chain single crystals of polyethylene measured with differential scanning calorimeter
Calorimeter apparatus accurately measures very small temperature rises on a test surface subjected to aerodynamic heating. A continuous thin sheet of a sensing material is attached to a base support plate through which a series of holes of known diameter have been drilled for attaching thermocouples to the material.
Superheating of linear high polymer polyethylene crystals, evaluating time dependence of melting, differential thermal analysis and calorimeter techniques
Crystalline polyethylene heat of fusion using scanning calorimeter
Tables of enthalpy and entropy increments for condensed phases of niobium pentachloride in drop calorimeter
Image intensifier photography of simulated cosmic ray shower development within ionization calorimeter containing large sheets of plastic scintillator
Cosmic ray flux measurements using calorimeters
Heats of solution of Ag and Cu in dilute Ag-Cu-Sn alloys at 720 K, using liquid metal- solution calorimeter
Heats of solution of Au and Cu in dilute Au-Cu-Sn alloys determined using liquid metal solution calorimeter, calculating self interaction coefficients
Cylindrical calorimeter designed to measure temperature dependent thermal conductivity for high performance insulation
Thermal conductivity of gaseous and liquid hydrogen with guarded horizontal flat plate calorimeter, investigating temperature and density effects in critical region
Apollo 11 sample specific heats at 90-350 K, using adiabatic calorimeter
Octahedral solid-solid phase transitions by differential thermal analyzer and scanning calorimeter module, discussing entropy change causes
Normal and para-hydrogen conductivity measurements at temperatures from 200 to 17 deg K, at densities up to 2.6 times critical density, and at pressures to 15 MN/sq m are made. Using new calorimeter, data are analyzed as functions of density at fixed temperatures and of temperature at fixed densities
Instrument of simple construction operates without vacuum enclosure over wide pressure range and temperatures from 218 to 398 deg K and defines absolute radiometric scale to within less than 0.5 mW/sq cm. It has potential application to meteorology and climatology and operates on electrical substitution calorimeter principle.
Thermal analysis of electrical cylindrical calorimeter used for multilayer insulation thermal conductivity tests - Vol. 1
A shock-swallowing, self-aspirating, local total enthalpy probe has been evaluated in a low density nonequilibrium, hypervelocity airstream. The probe, which incorporated an air gap to separate the internal and external cooling passages, was tested in an electric archeated wind tunnel at an average Mach number of 11.7 and an average Reynolds number per meter of 57,000. The free stream enthalpy probe data are compared with bulk calorimeter measurements of total enthalpy at the beginning of the gas expansion and with local total enthalpy inferred from a theoretical nonequilibrium gas expansion model by using free stream velocity measurements obtained from a mass flow probe. The three techniques are in relative agreement at the lower enthalpies. However, at the higher enthalpies, the enthalpy probe data lie considerably below the other data. This low data may be caused by the chemical and vibrational energy frozen in the flow not being sensed by the probe. Other problems associated with the shock-swallowing total enthalpy probe are discussed, and recommendations for improving the probe performance are presented.