Some factors contributing to scale effect at supersonic speeds.
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Some factors contributing to scale effect at supersonic speeds. by Ira Herbert Abbott

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Published by Advisory Group for Aeronautical Research in Paris .
Written in English


  • Aerodynamics, Supersonic

Book details:

Edition Notes

SeriesAGARD memorandum, AG8/M4
The Physical Object
Pagination26 p. illus., diagrs.
Number of Pages26
ID Numbers
Open LibraryOL16867364M

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ratio of the speed of the source to the speed of sound in air at that , at 0°C near the surface of Earth, Mach 2 is 2 × m/s = m/s. Speeds greater than Mach 1 are supersonic. Speeds for supersonic aircraft, such as the Concorde (Figure 3) and fighter aircraft, are given in terms of Mach number rather than kilometres per hour. velocity. This factor is reflected in the test section dimensions which for the supersonic facility are small compared with the other laboratory tunnels. However, the 20 HP (15 kW) motor required for starting and running at supersonic speeds is higher powered than either of our other tunnels, although the latter have much larger test sections. cruising at altitudes of ^0,—70, ft. and at speeds of — knots. Present plans call for these aircraft to take-off and climb at sub-sonic speeds to an altitude of 3 £,, ft. at which point the vehicle will transition to supersonic speed over a distance of 2^0 to 3^0 miles and climb abruptly to ££,—60, by: 3. Fig (i) A high-altitude supersonic vehicle causes a sonic boom at the ground but is not operating in ground effect; (ii) within several height-to-lengths (h/l) at near-sonic speeds, shocks reflect from the ground (other relevant parameters are shown); (iii) at low-supersonic speeds both normal and oblique reflections may occur; (iv) at fully.

H. Smith, in Innovation in Aeronautics, Propulsion. As with all aspects of supersonic aircraft design, the propulsion system is heavily constrained by numerous requirements. High thermal efficiency is, of course, of high importance to improve the payload fraction and will also contribute .   The actual value for the speed of sound varies according to air temperature and is lower when the air is cooler. Temperature in the atmosphere generally decreases with height (although due .   Since you know the mathematical equations, which says that for M>1, area increase will increase velocity, etc. Let's talk about the physics behind it, first of all it's always not necessary that the velocity increases for the converging diverging. A warp drive is a theoretical superluminal spacecraft propulsion system in many science fiction works, most notably Star Trek and much of Isaac Asimov's work. A spacecraft equipped with a warp drive may travel at speeds greater than that of light by many orders of magnitude. In contrast to some other fictitious faster-than-light technologies such as a jump drive, the warp drive does not permit.

  The speed of sound is influenced by several factors, including medium, density and temperature. The rate at which sound waves moves varies widely from one situation to the next and can change dramatically in a short period of time. The nesa coating used to defrost the windshield would not be required at super sonic speeds but might be useful at slower speeds. It was shown to have no adverse visual effects.1 VISUAL PROBLEMS OF SUPERSONIC SPEEDS V I S U A L EFFECTS PRODUCED BY SHOCK WAVES Visual effects produced by the shock waves themselves are a problem. Supersonic speed is the speed of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately m/s (1, ft/s; mph; kn; 1, km/h).Speeds greater than five times the speed of sound (Mach 5) are often referred to as hypersonic. Development of high speed code for airborne computer allowing for calculating sonic boom influence regions in a real time scale on the base of the weather data along and around the flight path. Developing the method for prediction of sonic boom signature deformation due to underwater penetration and propagation. Task С. SST-2 atmospheric impact.