Showing papers in "Progress in Aerospace Sciences in 1989"

TL;DR: Several ways for obtaining aerodynamic parameters of an aircraft from flight data are presented with the emphasis on present problem areas and a rather detailed treatment of two more often used techniques for parameter estimation.

TL;DR: In this article, the authors proposed an intelligent damage assessment system for aircraft, trains, cars and cars, which could make obsolete the catastrophic failures that sometimes plague our aircraft and cars today and lead to a revolution in engineering ethics.

TL;DR: In this paper, the authors discuss the need for consistent definitions of buffet and buffeting, the advantages of a consistent notation, buffeting due to wings and other components, the alleviation of buffeting and the special difficulties of flight tests.

TL;DR: The main interaction between the wake from the leading edge slat and the boundary layer on the upper surface of the main element of a multi-element aerofoil is considered in this paper.

TL;DR: In this paper, a compact three component system operated in backscatter and off-axis mode for laser Doppler anemometry (LDA) is described. But the authors focus on the important parameters influencing the proper operation of such an instrument in large wind tunnels to obtain the flow velocity.

TL;DR: In this article, the theory of Marangoni boundary layers developing near the free surface of a nonuniformly heated liquid is investigated, and the boundary layer effect on the form of a free surface is investigated.

TL;DR: In this paper, it is shown that even weak wind shear conditions, as they occur in the normal planetary boundary layer, can affect flight safety, especially when the aircraft's flight performance is adversely affected by an engine failure.

TL;DR: In this article, diagnostic techniques for propulsion systems dealing with temperature measurements by thermocouples and nonintrusive optical methods, velocity determination with lasers, concentration measurements using probes and optical techniques and regression rates in solid propellants, employing microwaves and ultrasonics.