Experimental Investigation of Air-flow Uniformity and Pressure Level on Wire Cloth for Transpiration-cooling Applications

Experimental Investigation of Air-flow Uniformity and Pressure Level on Wire Cloth for Transpiration-cooling Applications
Author: Patrick L. Donoughe
Publisher:
Total Pages: 32
Release: 1952
Genre: Aerodynamics
ISBN:

Abstract: An experimental investigation was conducted to obtain information on air-flow uniformity and pressure-level effects for various meshes of stainless-steel corduroy wire cloth, and permeability and strength data for a 20- by 20-mesh stainless-steel wire cloth. It was found that close control of the wire cloth thickness yielded sufficiently uniform air flow and that available methods may be used to predict the effect of pressure level. Permeability and strengths of the 20- by 20-mesh wire cloth were similar to those already available from other meshes. The reduced tensile strength of the 20- by 20-mesh wire cloth in the direction of the primary stresses is one and a half to three times as great as the strength of the best porous sintered materials presently available.

Experimental Investigation of Air-flow Uniformity and Pressure Level on Wire Cloth for Transpiration-cooling Applications

Experimental Investigation of Air-flow Uniformity and Pressure Level on Wire Cloth for Transpiration-cooling Applications
Author: Patrick L. Donoughe
Publisher:
Total Pages: 28
Release: 1956
Genre: Air flow
ISBN:

The problem of producing uniform air flow through a calendered or cold-rolled sheet of brazed stainless-steel corduroy wire cloth was investigated on 20x250 mesh cloth in regions of low permeability. The effect of the exit pressure level was determined at various exit pressures on 20x200, 20x250, and 28x500 mesh wire cloth. In addition, permeability and strength datta were obtained for 20x2000 mesh wire cloth to supplement results previously published on other meshes.

Report

Report
Author:
Publisher:
Total Pages: 524
Release: 1953
Genre: Aeronautics
ISBN:

Annual Report

Annual Report
Author: United States. National Advisory Committee for Aeronautics
Publisher:
Total Pages: 534
Release: 1953
Genre: Aeronautics
ISBN:

Wind-tunnel Investigation of Effects of Fuselage Cross-sectional Shape, Fuselage Bend, and Vertical-tail Size on Directional Characteristics of Nonoverlap-type Helicopter Fuselage Models Without Rotors

Wind-tunnel Investigation of Effects of Fuselage Cross-sectional Shape, Fuselage Bend, and Vertical-tail Size on Directional Characteristics of Nonoverlap-type Helicopter Fuselage Models Without Rotors
Author: James L. Williams
Publisher:
Total Pages: 736
Release: 1956
Genre: Helicopters
ISBN:

A low-speed investigatio was made in the Langley stability tunnel to determine the directional stability characteristics of tandem nonoverlap-type helicopter fuselages without rotors. The investigation consisted of a study of both bent and straight fuselages having either circular or essentially elliptical cross sections and with two vertical-tail sizes.