Collar, A. R.(H. M. Stationary Office, 1940-08-10)
Summary.—The present report is one of a series dealing with N.P.L. methods for the design of return flow wind tunnels. Reports already issued deal with the design of the Compressed Air Tunnel¹ and Open Jet Tunnels,² with ...
Lock, C. N. H.; Pankhurst, R. C.(H. M. Stationery Office, 1945-10)
The report describes a simplified 8-point strip theory method of calculating the free-air performance of a propeller up to tip Mach numbers near the velocity of sound. It is based on the assumptions of R. & M. 1674 and ...
A rapid method is described of making calculations of airscrew performance by means of charts. The first application is to ordinary strip theory calculations on the basis of the formulae of Ref. 5. Six charts are required ...
Lock, C. N. H.; Bateman, H.; Nixon, H. L.(H. M. Stationery Office, 1934-10)
The main series of tests of the original family of airscrews described in R&M 829 consisted of measurements of overall thrust and torque on 5 two-bladed and four-bladed airscrews of pitch diameter ratios 0.3, 0.5, 0.7, 1.0 ...
The present report gives a short account of a generalised type of Jankowski aerofoil which avoids the difficulty of extreme thinness near the trailing edge associated with the ordinary Jankowski aerofoils. Calculations ...
The effect of the boundaries of a wind tunnel on the flow in the neighbourhood of a symmetrical body (i.e. (a) in two dimensions, a cylinder having a plane of symmetry parallel to the axis of the tunnel : (b) in three ...
Approximate formulae for the interference on an aerofoil in a rectangular wind tunnel have been known and used for several years. More accurate formulae have been developed by Terazawa and Rosenhead, but their results are ...
Harmonic and subharmonic solutions are determined numerically for the forced oscillations of a system governed by Duffing's equation, and the stability of these oscillations is discussed.
Low-speed wind-tunnel tests were made to investigate the possibility of increasing the lift of a highly swept wing by ejecting high energy air from the leading edge. The results showed that lift gains were available, but ...
The steady flow incompressible laminar boundary-layer problem
in two-dimensions is posed as an integral equation in Crocco variables in the most general case.
Numerical investigations are then made of the 'similarity' ...
Flight measurements made by Mair in 1942, with the wake-traverse method, are used to extend to high Reynolds numbers (2 x 107) and a thick section (18 per cent t/c) the verification that the sub-critical creep (slow increase ...
J. E. Hesselgreaves; T. R. F. Nonweiler; T. R. Foord(1966)
Summary. A theoretical and experimental investigation is made of the heating of air by means of a 'dark' or 'Townsend' discharge, the intended application being the heating of the working fluid of a hypersonic intermittent ...
It is important to study the effects of air condensation in hypersonic wind tunnels and to establish the degree of supersaturation achievable because savings in heating requirements or increase in Mach number may be achieved. ...
The present state of knowledge concerning the interaction between shock waves and boundary layers, and several examples of the importance of the interaction in high-speed flight were described in a previous report. It was ...
The preparation of this bibliography of Heat Transfer Instrumentation was undertaken by the authors at the request of the Heat and Mass Transfer Sub-Committee of the Aeronautical Research Council. It is based upon an initial ...
The Report presents a theory of the aerodynamic interference between a helicopter rotor blade and a fuselage or wing. A two-dimensional analysis is made to which a correction factor is applied to convert the two-dimensional ...