منابع مشابه
Weak-shock Reflection Factors
Ernst Mach (1838-1916) was the first to discover an irregular reflection phenomenon of shock waves, as is well known in our community. In fact, this occurred in 1875-three years earlier than usually assumed in the literature [1]. However, it is correct that Mach gave the physical interpretation of this phenomenon in 1878 [2]. Since Mach's discovery of an irregular shock reflection pattern some ...
متن کاملOblique Shock Waves and Shock Reflection ∗ †
Oblique and conical shock waves are generated as solid projectile flies supersonically, or as a planar shock wave is reflected along a ramp. We study the stability of oblique shock waves for full Euler system of equations in gas-dynamics. The stability criterion is applied to the discussion of regular shock reflection phenomena and the transition of a regular shock reflection to Mach reflection.
متن کاملInfluence of Bottom Trawling on the Normal- Incidence Reflection Coefficient
A North Sea area characterized by muddy, sandy, and gravelly sediments is surveyed with a single-beam echo sounder operating at 12, 38, and 200 kHz. Closely spaced survey legs and a high repetition rate of five sounder pings per second allow the production of echo energy maps with a high spatial resolution. These energy maps reveal a series of string-like features, which are believed to be due ...
متن کاملEffect of Interface Roughness on the Reflection Coefficient
All surfaces and interfaces between dissimilar materials are rough. The extent to which this roughness affects the reflection of elastic waves has been the subject of study for many decades. A recent book by Ogilvy [1] provides a comprehensive review and summary of this subject. The problem is of particular interest in ultrasonic nondestructive evaluation. For example, it has been shown that fo...
متن کاملAdiabatic Asymptotics of the Reflection Coefficient
The properties of the functions f and M are well known (see, e.g., [1]). The function R = −MM , defined for k ∈ R, |R| = 1, is called the reflection coefficient. If v(x) = p( x), where > 0 is a small parameter, then all these objects become functions of , and we may ask about the asymptotic behavior as → 0 of, say, the solution f , via which M , R, and ψ can be expressed. Such asymptotics is sa...
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ژورنال
عنوان ژورنال: AIAA Journal
سال: 1967
ISSN: 0001-1452,1533-385X
DOI: 10.2514/3.3984