Explanipedia

Dual Active Surface Heat Flux Gage Probe Open

C. H. Liebert, Paul Kolodziej · 1995

A unique plug-type heat flux gage probe was tested in the NASA Ames Research Center 2x9 turbulent flow duct facility. The probe was fabricated by welding a miniature dual active surface heat flux gage body to the end of a hollow metal cyli…

Miniature Convection Cooled Plug-type Heat Flux Gauges Open

C. H. Liebert · 1994

Materials science Physics

Tests and analysis of a new miniature plug-type heat flux gauge configuration are described. This gauge can simultaneously measure heat flux on two opposed active surfaces when heat flux levels are equal to or greater than about 0.2 MW/m(s…

Miniature high temperature plug-type heat flux gauges Open

C. H. Liebert · 1992

Engineering Environmental science Materials science

The objective is to describe continuing efforts to develop methods for measuring surface heat flux, gauge active surface temperature, and heat transfer coefficient quantities. The methodology involves inventing a procedure for fabricating …

Heat flux measurement in SSME turbine blade tester Open

C. H. Liebert · 1990

Engineering Environmental science Materials science

Surface heat flux values were measured in the turbine blade thermal cycling tester located at NASA-Marshall. This is the first time heat flux has been measured in a space shuttle main engine turbopump environment. Plots of transient and qu…

Calibrator tests of heat flux gauges mounted in SSME blades Open

C. H. Liebert · 1989

Materials science Engineering Physics

Measurements of heat flux to space shuttle main engine (SSME) turbine blade surfaces are being made in the Lewis heat flux calibration facility. Surface heat flux information is obtained from transient temperature measurements taken at poi…

Heat flux measurements Open

C. H. Liebert, Donald H. Weikle · 1989

Materials science Environmental science Engineering

A new automated, computer controlled heat flux measurement facility is described. Continuous transient and steady-state surface heat flux values varying from about 0.3 to 6 MW/sq m over a temperature range of 100 to 1200 K can be obtained …

Measurement of local high-level, transient surface heat flux Open

C. H. Liebert · 1988

Materials science Physics Computer science

This study is part of a continuing investigation to develop methods for measuring local transient surface heat flux. A method is presented for simultaneous measurements of dual heat fluxes at a surface location by considering the heat flux…

Heat flux calibration facility capable of SSME conditions Open

C. H. Liebert · 1987

Environmental science Engineering Materials science

There is a need to more thoroughly characterize the hostile space shuttle main engine (SSME) turbopump environment. It has been estimated that component surface heat flux in the hot-gas environment is about 10 MW/square meter, and this is …

High temperature thermocouple and heat flux gauge using a unique thin film-hardware hot juncture Open

C. H. Liebert, R. Holanda, S. A. Hippensteele, C. A. Andracchio · 1984

Materials science Engineering Physics

A special thin film-hardware material thermocouple (TC) and heat flux gauge concept for a reasonably high temperature and high flux flat plate heat transfer experiment was fabricated and tested to gauge temperatures of 911 K. This concept …

Measured and Calculated Wall Temperatures on Air-Cooled Turbine Vanes With Boundary Layer Transition Open

C. H. Liebert, Raymond E. Gaugler, H. J. Gladden · 1983

Materials science Physics Chemistry

Convection cooled turbine vane metal wall temperatures experimentally obtained in a hot cascade for a given one-vane design were compared with wall temperatures calculated with TACT1 and STAN5 computer codes which incorporated various mode…

Further industrial tests of ceramic thermal barrier coatings Open

C. H. Liebert, Stanley R. Levine · 1982

Materials science Engineering Chemistry

The NASA Lewis Research Center made technical assistance arrangements (contracts) with several commercial organizations under which Lewis designed plasma-sprayed thermal-barrier coatings (TBC) for their products. Lewis was then furnished w…

Emittance and absorptance of NASA ceramic thermal barrier coating system Open

C. H. Liebert · 1978

Materials science Physics

Spectral emittance measurements were made on a two-layer ceramic thermal barrier coating system consisting of a metal substrate, a NiCrAly bond coating and a yttria-stabilized zirconia ceramic coating. Spectral emittance data were obtained…

Summary of NASA Research on Thermal-Barrier Coatings Open

F. S. Stepka, C. H. Liebert, S. Stecura · 1977

Materials science Computer science Engineering

This paper summarizes the work conducted at the NASA Lewis Research Center to evolve and evaluate a two-layer, thermal-barrier coating system. A durable, two-layer, plasma-sprayed coating consisting of a ceramic layer over a metallic layer…

Ceramic thermal-barrier coatings for cooled turbines Open

C. H. Liebert, F. S. Stepka · 1976

Materials science Physics

Coating systems consisting of a plasma sprayed layer of zirconia stabilized with either yttria, magnesia or calcia over a thin alloy bond coat have been developed, their potential was analyzed and their durability and benefits evaluated in…

Potential use of ceramic coating as a thermal insulation on cooled turbine hardware Open

C. H. Liebert, F. S. Stepka · 1976

Materials science Engineering

An analysis was made to determine the potential benefits of using a ceramic thermal insulation coating of calcia-stabilized zirconia on cooled engine parts. The analysis was applied to turbine vanes of a high temperature and high pressure …

A method for measuring cooling air flow in base coolant passages of rotating turbine blades Open

C. H. Liebert, F. G. Pollack · 1975

Materials science Physics Engineering

Method accurately determines actual coolant mass flow rate in cooling passages of rotating turbine blades. Total and static pressures are measured in blade base coolant passages. Mass flow rates are calculated from these measurements of pr…

Method of predicting radiation heat transfer in turbine cooling test facilities Open

H. J. Gladden, C. H. Liebert · 1975

Environmental science Materials science Engineering

A method is presented for calculating the average net radiation heat flux to turbine vanes and blades. The net radiation heat flux at a vane leading edge calculated by this method was compared with heat flux values independently determined…

Rotating pressure measuring system for turbine cooling investigations Open

F. G. Pollack, C. H. Liebert, Victoria Peterson · 1972

Engineering Physics

The development of a 10-channel rotating pressure measuring system capable of operation to speeds of 9000 rpm at transducer temperatures of about 320 K (120 F) is described. Variable-reluctance pressure transducers were mounted in the rota…

Theoretical temperatures of thin-film solar cells in earth orbit Open

R. R. Hibbard, C. H. Liebert · 1968

Physics Materials science Engineering

Equations, charts, and analysis to calculate theoretical temperatures of thin film solar cells in earth orbit

Spectral emittance of aluminum oxide and zinc oxide on opaque substrates Open

C. H. Liebert · 1965

Materials science Physics

Normal spectral emittance of aluminum and zinc oxide applied to opaque substrates of different radiative properties

PERFORMANCE OF SOLAR REFLECTORS WHEN APPLIED TO STORAGE OF CRYOGENIC PROPELLANTS IN SPACE Open

R. R. Hibbard, C. H. Liebert · 1964

Materials science Chemistry Physics

SUMMARY An analysis was performed to determine the effectiveness of solar reflec- tors in reducing heat transfer through the insulation of cryogenic fuel tanks located in deep space. A solar reflector, as used herein, is defined as a sur- …

DETERMINATION OF LOCAL EXPERIMENTAL HEAT-TRANSFER COEFFICIENTS ON COMBUSTION SIDE OF AN AMMONIA-OXYGEN ROCKET Open

C. H. Liebert, R. C. Ehlers · 1961

Materials science Chemistry Engineering

Local experimental heat-transfer coefficients were measured in the chamber and throat of a 2400-pound-thrust ammonia-oxygen rocket engine with a nominal chamber pressure of 600 pounds per square inch absolute. Three injector configurations…

Permeability Variation of a Taper-rolled Wire Cloth Open

Anthony J Diaguila, C. H. Liebert · 1957

Materials science Engineering Computer science

Report presenting the cloth permeability of rolling a tapering thickness on a 20x200-mesh stainless-steel wire clothing investigated experimentally. The application of the cloth was for the shell of a transpiration-cooled turbine blade ope…

Progress in the measurement of SSME turbine heat flux with plug-type sensors Open

C. H. Liebert ·

Engineering Materials science Physics

Data reduction was completed for tests of plug-type heat flux sensors (gauges) in a turbine blade thermal cycling tester (TBT) that is located at NASA/Marshall Space Flight Center, and a typical gauge is illustrated. This is the first time…

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