Topic
Supersonic speed
About: Supersonic speed is a research topic. Over the lifetime, 24230 publications have been published within this topic receiving 267045 citations. The topic is also known as: Mach 1 & supersonic.
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795 citations
TL;DR: In this paper, cold beams of metal clusters are produced by combining a laser vaporization technique with pulsed supersonic nozzle technology, and the results show that the resulting cold beams are more stable than those of traditional laser-based methods.
Abstract: Cold beams of metal clusters are produced by combining a laser vaporization technique with pulsed supersonic nozzle technology. (AIP)
750 citations
TL;DR: In this paper, the transonic small disturbance theory is used to solve for the flow past thin airfoils including cases with imbedded shock waves, and a boundary value problem is formulated for the case of a subsonic freestream Mach number.
Abstract: Transonic small disturbance theory is used to solve for the flow past thin airfoils including cases with imbedded shock waves. The small disturbance equations and similarity rules are presented, and a boundary value problem is formulated for the case of a subsonic freestream Mach number. The governing transonic potential equation is a mixed (elliptic-hyperbolic) differential equation which is solved numerically using a newly developed mixed finite difference system. Separate difference formulas are used in the elliptic and hyperbolic regions to account properly for the local domain of dependence of the differential equation. An analytical solution derived for the far field is used as a boundary condition for the numerical solution. The difference equations are solved with a line relaxation algorithm. Shock waves, if any, and supersonic zones appear naturally during the iterative process. Results are presented for nonlifting circular arc airfoils and a shock free Nieuwland airfoil. Agreement with experiment for the circular arc airfoils, and exact theory for the Nieuwland airfoil is excellent.
651 citations
626 citations
01 Jan 1958
TL;DR: In this paper, the results of experimental and theoretical research conducted on flow separation associated with steps, bases, compression corners, curved surfaces, shock-wave boundary-layer reflections, and configurations producing leading-edge separation are presented.
Abstract: Report presents the results of experimental and theoretical research conducted on flow separation associated with steps, bases, compression corners, curved surfaces, shock-wave boundary-layer reflections, and configurations producing leading-edge separation. Results were obtained from pressure-distribution measurements, shadowgraph observations, high-speed motion pictures, and oil-film studies. The maximum scope of measurement encompassed Mach numbers between 0.4 and 3.6, and length Reynolds numbers between 4,000 and 5,000,000.
615 citations