A study of the local pressure field in turbulent shear flow and its relation to aerodynamic noise generation Semiannual status report, 1 Aug. 1970 - 31 Jan. 1971

Relation of Eulerian and Lagrangian structure of pseudosound pressure and velocity fields in turbulent shear flow to aerodynamic noise generatio

High Performance Turboalternator and Associated Hardware. 1 - Design of Turboalternator

Performance of two stage axial flow turbogenerator with gas bearing rotor support syste

Turbulence Measurements with the Split-Film Anemometer Probe

The newly developed split-film anemometer probe, manufactured by Thermo- Systems, Inc. of St. Paul, Minnesota, has been applied to the measurement of two-dimensional turbulence characteristics, including turbulent shear stress, in mixing layer and boundary layer shear flows. Probes of both 6-mil and 2- mil diameters were used which had the same physical dimensions as ordinary hot-film anemometer probes. The film on this sensor is split into two 170° elements resulting in two independent sensors. This enables the probe to detect vertical as well as axial components of the instantaneous velocity vector. It therefore serves the same purpose as an x-probe, but because of its very small size it has significant advantages in regions of very high shear, particularly in the region close to the wall in the boundary layer. The response equations used to evaluate flow characteristics from the anemometer signals are presented. Operating features such as frequency response, aximuthal yaw sensitivity, signal-to-noise, and stability are discussed and comparisons are made with those of an x-probe. Measurements in turbulent air flow using a hot-wire, x-probe, and split-film probe are presented and the performance of the latter is discussed. The results show that the split-film probe is a promising device for measuring two-dimensional turbulence information, particularly when high transverse spatial resolution is required. However, until improvements can be made, adequate frequency response should be verified by the experimenter for each flow regime of anticipated use

The effect of bedrest on various parameters of physiological function. part xi- the effect of bedrest on blood volume, urinary volume, and urinary electrolyte excretion

Effect of bed rest on blood volume, urinary volume, and urinary electrolyte excretio

The effect of bedrest on various parameters of physiological function. part viii- the . . . effect on the cardiovascular tolerance to passive tilt

Effect of short and long term bed rest on cardiovascular tolerance to passive til

The effect of bedrest on various parameters of physiological function. Part XIII - A review of possible mechanisms of orthostatic intolerance to passive tilt

Possible mechanisms of orthostatic intolerance to passive tilt - bed rest and water immersion effects on various parameters of physiological functio

The effect of bedrest on various parameters of physiological function. Part X - The effect of bedrest on the circulatory response to a valsalva maneuver

Quantitative arterial blood pressure change during Valsalva maneuver after bed res

The effect of bedrest on various parameters of physiological function. part xii- the effect of bedrest on bone mass and calcium balance

Bed rest effect on various parameters of physiological functions - bone mass and calcium balanc

The effect of bedrest on various parameters of physiological function. part vii- cardiac and ventilatory response to the bicycle ergometer test

Cardiac and ventilatory response to bicycle ergometer tes

The effect of bedrest on various parameters of physiological function. part vi- the effect of the performance of periodic flack maneuvers on preventing cardiovascular deconditioning of bedrest

Preventing cardiovascular deconditioning of bedrest by periodic Flack maneuvers - physiological performance and efficienc