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Layout of internal and external flow waverider aircraft

An aircraft and layout technology, applied in the field of aircraft aerodynamic design, can solve problems such as the large filling space of air-breathing ramjet engines, the difficulty of increasing the lift-to-drag ratio of gliding flight, and the difficulty of aerodynamic layout design. The effect of improving the performance of the intake port and reducing the coupling effect

Active Publication Date: 2018-04-03
CHINA ACAD OF AEROSPACE AERODYNAMICS
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AI Technical Summary

Problems solved by technology

The cross-domain aircraft has the characteristics of large airspace and wide speed range, and its aerodynamic layout design is more difficult, which is mainly reflected in two aspects: on the one hand, the existence of the air-breathing ramjet will occupy a large loading space, making gliding It is difficult to increase the lift-to-drag ratio of flight
On the other hand, the leading edge passivation radius required for gliding flight and air-breathing cruise flight is quite different, and the entropy layer generated by the large passivated leading edge entering the inner flow channel of the air-breathing engine will greatly reduce the performance of the power system , especially the performance of the inlet
Therefore, the aerodynamic layout design of new aircraft that meets the characteristics of cross-domain flight will face greater challenges

Method used

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  • Layout of internal and external flow waverider aircraft
  • Layout of internal and external flow waverider aircraft
  • Layout of internal and external flow waverider aircraft

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Embodiment

[0039] like Figure 4As shown, it is a schematic diagram of the layout parameters of the aircraft of the present invention, the lower half of the aircraft fuselage is a waverider, the length of the waverider is L=4949mm, and the width W=2527mm. The aircraft front body and the air inlet are located at the upper half of the aircraft fuselage, wherein the aircraft front body is in the shape of a canard, with a maximum length of L=738mm and a maximum width of W=800mm. The position of the maximum length of the front body is the initial position of the inlet of the inlet. The trapping shape of the inlet of the airway is semicircular, with width W=800mm and height H=345mm; the shape of the outlet of the airway is ellipse, the semi-major axis a / 2=225mm, and the semi-minor axis b / 2=60mm. The intake port is followed by a combustion chamber and a tailpipe (not shown). The aircraft precursor and the air inlet are designed in an integrated manner, that is, the width of the entrance of th...

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Abstract

The invention relates to aerodynamic layout of an internal and external flow waverider aircraft and belongs to the technical field of aerodynamic design of aircrafts. The aircraft is divided into an upper part and a lower part in terms of aerodynamic layout design; the lower part of the aircraft is mainly used for providing high lift-drag ratio for unpowered gliding flight with high Mach number, and a flat waverider layout form is adopted; the upper part of the aircraft is mainly used for arranging an air suction type ramjet. According to the layout form, an engine flow channel and a waveriderplane are mutually independent and non-interfering, so that coupling effect of pneumatics and power is greatly reduced, particularly, resistance produced by an engine during unpowered flight with high Mach number can be obviously reduced, increase of the lift-drag ratio during unpowered flight with high Mach number is facilitated, and furthermore, thermal protection of the engine is facilitated.

Description

technical field [0001] The invention relates to an aerodynamic layout of an internal and external flow waverider aircraft, and belongs to the technical field of aircraft aerodynamic design. Background technique [0002] Hypersonic technology is the commanding height of the development of aerospace technology in the 21st century. Hypersonic aircraft refers to aircraft with a flight speed exceeding 5 times the speed of sound (that is, Mach number 5), such as intercontinental ballistic missiles, manned spacecraft, space shuttles, etc. The maximum speed can reach More than 20 times the speed of sound, all belong to hypersonic aircraft. In addition to traditional hypersonic vehicles such as intercontinental ballistic missiles, the following two types of near-space hypersonic vehicles have attracted international attention in the past decade or so. [0003] (1) Adjacent space air-breathing cruise vehicle [0004] This type of aircraft is a type of aircraft powered by scramjet an...

Claims

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Application Information

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IPC IPC(8): B64C1/00B64F5/00
CPCB64C1/0009B64F5/00
Inventor 张红军陈冰燕王荣白鹏
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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