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Performance factors for circular, hydrostatic, gas-lubricated thrust bearings. Part III. Ring thrust bearings

Dudgeon, E.H. (author), Maki, M.C. (author)

A general design procedure for ring type, hydrostatic, gas thrust bearings has been derived. Dimensionless load and flow factors have been calculated for a wide range of bearing parameters using a conformal transformation procedure proposed by Mori and Yabe. These factors are combined with empirical correlations for the bearing entry losses to...

report 1973

document

High speed water jets from vertically accelerated rotating cones

Savic, P. (author), Allan, J.D. (author), van Blokland, G.P. (author)

Water jets are produced by vertically accelerating a rotating cone partially filled with water. It is shown that the acceleration of the parabolic meniscus results in a motion similar to that observed in a shaped explosive charge. (Monroe jet). Acceleration of the cone is effected by means of an inductive electromagnetic accelerating device ...

report 1972

document

Performance factors for circular, hydrostatic, gas-lubricated thrust bearings. Part II. Multiple inlet thrust bearings

Dudgeon, E.H. (author), Maki, M.C. (author)

A general design procedure for multiple-inlet gas thrust bearings has been derived. Dimensionless load and flow factors have been calculated for a wide range of bearing parameters using a conformal transformation procedure proposed by Mori and Yabe. These factors are combined with empirical correlations for the bearing entry losses to provide a...

report 1971

document

Tunnel flow breakdown from inclined jets

Tyler, R.A. (author), Williamson, R.G. (author)

Inclined single and paired jets were operated through the regime of floor vortex formation in the NRC 10-ft x 20-ft V/STOL propulsion tunnel. Observed floor stagnation positions are correlated in terms of a jet force coefficient. Limiting conditions for vortex formation (incipient stagnation) are derived for a wide range of jet inclination to...

report 1971

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Performance factors for circular, hydrostatic, gas-lubricated thrust bearings. Part I. Single inlet thrust bearings

Dudgeon, E.H. (author)

Procedures are described for the design of both orifice-compensated nnd inherently-compensated hydrostatic gas thrust hearings. A new empirical correlation for the compensation loss in inherently-compensated bearings is presenteel. The analytical predictions are compared with experimental results for a number of different single inlet thrust...

report 1970

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A study of flow phenomena in externally pressurized gas thrust bearings

Lowe, I.R.G. (author)

An experimental study of an externally pressurized, gas-lubricated, circular thrust hearing with central admission and operating in the inherent compensation mode is reported. Gas supply pressures covered the range from 1. 25 ta 4.0 atmospheres (absolute) while clearances varied from 0 . 0005 inch ta 0. 005 inch. Three reed-hole radius to...

report 1970

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Balance measured thrust performance of various cowled axial fan configurations in a mainstream at 90º incidence

Tyler, R.A. (author), Williamson, R.G. (author)

Balance measured force data are presented for a series of thrusting fan configurations (tip dia. 15") operated in cross-flow, at 900 incidence, in the 10 ft. x 20 ft. N.R.C. V/STOL Propulsion Tunnel. Test conditions involved tunnel speeds from 30 to 130 ft.jsec. in combination with mean intake velocities from 100 to 400 ft./sec. The force data...

report 1970

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Circulation control by slot suction on a circular cylinder: measured force characteristics of a smooth double-slotted cylinder

Tyler, R.A. (author), Williamson, R.G. (author)

report 1970

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Circulation control by slot suction on a circular cylinder preliminary measured force data

Tyler, R.A. (author), Williamson, R.G. (author)

report 1970

document

Experimental investigation of slotted engine intakes in the upper surface of a thick wing

Tyler, R.A. (author), Williamson, R.G. (author)

The effects of flow rates appropriate to engine requirements through slotted intakes in the rear upper surface of a thick wing were investigated. The basic test configuration incorporated a 31.5 percent thick aerofoil of 3-ft chord and 4-ft span. The aerofoil was equipped with a wide (5 percent chord), fun span intake slot, located at 65 percent...

report 1968

document

Exploratory study of the initiation of low-density petn by hydrogen-oxygen detonation waves

Makomaski, A.H. (author)

report 1968

document

A method of preparation of PETN-impregnated foams capable of inition by gaseous detonation waves

Makomaski, A.H. (author), Darling, J.A. (author)

A technique is described for impregnating polyurethane foam with PETN. The method consists of soaking up the foam in a saturated PETN/acetone solution and precipitating the crystals within the foam by rapid dilution with water. Using foam ˜ 1 inch in diameter, precipitation from a solution at the boiling point (˜ 61½°C) results in the explosive...

report 1968

document

Normal reflection of a plane gaseous detonation wave in a tube

Makomaski, A.H. (author)

A method, together with a FORTRAN IV computer program, is presented for the calculation of the trajectory and properties of a shock wave generated on normal reflection of an idealized gaseous detonation wave in a tube. The detonation wave is assumed to be formed by energetic ignition resulting in zero detonation induction distance. The...

report 1967

document

Optical interferometry for plasma measurements in a theta-pinch device

Panarella, E. (author)

This is a brief review of optical interferometry in its app1ication to plasma diagnostics. A theta-pinch experiment is described and some results are given.

report 1966

document

Inductive plasma conductivity probes

Savic, P. (author), Stubbe, E. (author)

A survey is presented that discusses current probe configurations, based on the magnetic coupling between a radio frequency magnetic field and an electrical conducting medium, to measure the electrical conductivity of the medium. A theoretical study indicates that the electrical conductivity of a plasma can be detected either as an inductance or...

report 1966

document

The rapid, continuous measurement of sulphur dioxide in the flue gas from a copper converter

Dudgeon, E.H. (author), Evans, E.V. (author)

The sulphur dioxide concentration of the gas emitted from a capper converter has been measured on a continuous time basis with an over- all time lag of less than 10 seconds. An infrared analyser was used as the detection unit. The sulphur dioxide level was used to predict the end point of the capper blow phase of the conversion operation,...

report 1965

document

A theoretical analysis of hydrostatic gas journal bearings

Dudgeon, E.H. (author), Lowe, I.R.G. (author)

An analytical method for predicting tbe performance of bydrostatic gas journal bearings has been developed. This treatment includes allowances for the dispersion of the gas from multiple orifices into the clearance space and for circumferential flow due to tbe eccentricity of the loaded shaft. The solution of the set of simultaneous flow...

report 1965

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Measured circular intake performance in inclined flow for a series of semi-circular lip profiles

Tyler, R.A. (author), Williamson, R.G. (author)

Data, relating mainly to mean total pressure 1055, in inclined flow, are presented for a series of five circular intakes with common centre- body (0.5 diameter ratio) and employing semi-circular lip profiles. Lip radius to intake, radius ratios were 0 . 10, 0 . 15, 0 . 20, 0 . 25 and 0 . 30 . Measurements were made at velocity ratios up to 2 .0...

report 1965

document

The pressures on a surface surrounding a jet issuing normal to a mainstream

Peake, D.J. (author)

In subsonic flow, the pressures on a wing surface have been measured when a jet issued normally from the surface inta a mainstl'eam. The area of the jet arifiee was approximately 0.18 percent of the wing area. Three configurations of jet arifiee having aspect ratios of 0.25, 1 and 4, were investigated. The tests were conducted at mainstream...

report 1964

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Pressure loss and flow distortion measurements on circular compressor intakes in inclined flow

Tyler, R.A. (author), Williamson, R.G. (author)

Data relating to mean total pressure loss and flow distortion in full-scale circular intakes under cross- flow conditions are presented for a range of cowl lip profiles. Five cowl shapes were tested over a range of velocity ratio from 0 te 0.7 and at cross - flow angles from 0 to 165 degrees. Boundaries were established between the regime in...

report 1964