| 词汇 | wave-drag |
| 释义 | BETA wave dragcollocation in Englishmeanings of waveand dragThese words are often used together. Click on the links below to explore the meanings. wave noun[ C ] uk /weɪv/ us /weɪv/ a raised line of water that moves across the surface of an area of water, especially ... See more at wave drag noun uk /dræɡ/ us /dræɡ/ informal something that is not convenient and is boring ... See more at drag Examples of wave dragwave drag Furthermore, it is known that viscous effects, which are disregarded in the theories we examine, can influence the wavedrag. The latter term describes the energy loss or wavedrag resulting from the fact that the ambient medium can support internal waves. The linearized approximation (thin-ship theory) is known t o yield results which are in poor agreement with the experimental wavedrag for bodies of practical shape. These include stalling, high-lift devices including ' flexible ' variable-geometry systems, boundary-layer control, jet flaps, buffeting, supercritical aerofoils, wavedrag in supersonic flight, blunt trailing edges and wing-body strakes. This accelerated region has two reasons for existence, one being associated with the inviscid or wavedrag, and the other with the viscous wakes and form drag. In discussing design methods, the conditions to be satisfied at low speeds are considered first, before going on to a discussion of wavedrag at supersonic speeds. At even higher speeds in the transonic, wavedrag enters the picture. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In supersonic flow regimes, wavedrag is commonly separated into two components, supersonic lift-dependent wavedrag and supersonic volume-dependent wavedrag. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This shock causes transonic wavedrag, and can induce flow separation behind it; both have negative effects on the airfoil's performance. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The larger fuselage size causes more skin friction drag and wavedrag. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There are two effects in particular, wavedrag and critical mach. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This process is far more complicated than it sounds, due to the resistance the advancing wavefront encounters (similar to wavedrag). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In transonic flight, wavedrag is commonly referred to as transonic compressibility drag. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The reason is that all propellers lose efficiency at high speed, due to an effect known as wavedrag that occurs just below supersonic speeds. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In 1947, studies into both problems led to the development of "perfect" shapes to reduce wavedrag as much as theoretically possible. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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