Engineering topics

Adams, E. W.

Publications and source records attributed to Adams, E. W..

13 records

NASA NTRS1983

A mixing-length model for the prediction of convex curvature effects on turbulent boundary layers

A mixing-length model is developed for the prediction of turbulent boundary layers with convex streamwise curvature. For large layer thickness ratio, delta/R greater than 0.05, the model scales mixing length on the wall radius of curvature, R. For small delta/R, ordinary flat wall modeling is used for the mixing-length profile with curvature corrections, following the recommendations of Eide and Johnston (1976). Effects of streamwise change of curvature are considered; a strong lag from equilibrium is required when R increases downstream. Fifteen separate data sets were compared, including both hydrodynamic and heat transfer results. Six of these computations are presented and compared to experiment.

Adams, E. W.↗

NASA NTRS1968

Theory of the investigation of the atmosphere of binary stars by analogy between gas dynamics and shallow-water flows

Gaseous motion and hydrodynamic model for analysis of binary star atmosphere

Adams, E. W.↗

NASA NTRS1967

Theory of the investigation of the atmosphere of binary stars by use of the analogy between gas dynamics and shallow water flow

Theoretical investigation of atmosphere of binary stars based on analogy between gas dynamics and shallow water flow

BINARY STAR↗

NASA NTRS1967

Theoretical solution of the nonlinear problem of transient cooling of an opaque sphere in space

Temperature distribution in homogeneous opaque sphere traveling in space

SPHERE↗

NASA NTRS1965

Tektite structure and lunar ash flows.

Tektite formation by lunar ash flow proposed, calculating pressure, temperature and voidage of ash flow from nonlinear equation

FLOW EQUATION↗

NASA NTRS1964

The low and the high prandtl number approaches for heat transfer in laminar flow of incompressible fluids with constant material properties

Low & high prandtl number approaches for heat transfer in laminar flow of incompressible fluids with constant material properties

PRANDTL NUMBER↗

NASA NTRS1964

Heat and mass transfer in binary inert gas flow for distributions of temperature and concentration rendering the properties nearly constant

Injection of foreign gas into laminar air boundary layer - heat and mass transfer problems solved by simple calculation method of similarity equations

ENERGY TRANSFER↗

NASA NTRS1964

An explanation of tektite chemistry in terms of lunar ash flows

Pressure, temperature, and voidage calculations for lunar ash flow explanation of tektite chemistry

GEOCHEMISTRY↗

NASA NTRS1963

STUDIES ON ABLATION OF OBJECTS TRAVERSING AN ATMOSPHERE

Ablation-type thermal protection of objects traversing an atmosphere - earth and mars

MARS ATMOSPHERE↗

NASA NTRS1963

AERODYNAMIC ANALYSIS OF TEKTITES AND THEIR PARENT BODIES

Ablation analysis of tektites and their parent bodies by fusion of opaque siliceous stone into glass by aerodynamic heating to prove tektite origin

EXTRATERRESTRIAL MATTER↗

NASA NTRS1963

Aerodynamic analysis of tektites and their hypothetical parent bodies.

Ablation and trajectory effects on the shaping of australites, assuming a hypothetical parent body

TEKTITE↗

NASA NTRS1962

Aerodynamic analysis of tektites and their parent bodies

Trajectory, aerodynamic heating, and ablation analysis of glass spheres in hypersonic flight, for investigation of tektite origins

TRAJECTORY ANALYSIS↗

NASA NTRS1962

Aerodynamic Analysis of Tektites and Their Parent Bodies

Experiment and analysis indicate that the button-type australites were derived from glassy spheres which entered or re-entered the atmosphere as cold solid bodies; in case of average-size specimens, the entry direction was nearly horizontal and the entry speed between 6.5 and 11.2 km/sec. Terrestrial origin of such spheres is impossible because of extremely high deceleration rates at low altitudes. The limited extension of the strewn fields rules out extraterrestrial origin of clusters of such spheres because of stability considerations for clusters in space. However, tektites may have been released as liquid droplets from glassy parent bodies ablating in the atmosphere of the earth. The australites then have skipped together with the parent body in order to re-enter as cold spheres. Terrestrial origin of a parent body would require an extremely violent natural event. Ablation analysis shows that fusion of opaque siliceous stone into glass by aerodynamic heating is impossible.

Adams, E. W.↗