Design method of close surface waverider for hypersonic vehicle
A technology of hypersonic speed and design method, applied in aircraft parts, ground equipment, transportation and packaging, etc., can solve the problems of determining streamline integration, restrictions, etc., and achieve the effect of improving the wave-riding characteristics
Active Publication Date: 2017-03-29
BEIHANG UNIV
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This limits the application of the close inner cone waverider design method, because it is impossible to determine whether the streamline integral will exceed the odd line polar angle when the shock wave shape is given at the beginning of the design
[0006] The current waverider design method can only be used to design the waverider whose shock section shape is a concave curve, segmented concave curve or convex curve, so the planar shape of the waverider can only be that the leading edge sweep angle is continuously increasing simple shape of
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[0034] Example: Design Mach number Ma=5.0, shock angle β=14.3°. A waverider with an S-shaped leading edge is designed by using a closely curved waverider, which cannot be realized by traditional methods. The top view of the designed waverider is as follows: image 3 shown. Figure 4 The change curve of lift-to-drag ratio of the designed waverider with Mach number is given. It can be seen from the figure that the waverider designed based on the close curved surface method provided by the present invention has good lift-to-drag characteristics, the maximum lift-to-drag ratio reaches 8.85 in non-viscous flow, and 6.86 in viscous flow. The aircraft has a high lift-to-drag ratio in the range of Mach number 4-6.
[0035] Figure 5 The isobaric contours of the flow field simulated by the N-S equation in the design state are given. It can be seen from the figure that the shape curve of the shock wave section is similar to an S shape, with both concave and convex curves, and the...
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The invention discloses a hypersonic speed aircraft osculating curved surface waverider design method, and belongs to the technical field of aircraft design. According to the method, an osculating cone waverider design method is firstly improved, and the osculating cone waverider design method is subjected to continuation. On the basis of the Sobieczky three-dimensional flowing simplification, the process of transiting the osculating cone into the osculating wedge and then transiting the osculating wedge into the osculating inner cone is smooth; the transverse flowing is regarded to be weak; and the flowing mainly occurs in the osculating plane. Therefore a complicated cross section shockwave curve with any curvature can be divided into a concave curve section, a convex curve section and a transition section; a series of local osculating cone / wedge flows with identical shockwave strength are respectively used for approximation; and the obtained after-wave flow field has the second-order accuracy, and can be used for waverider design. The shockwave with any curvature cross section shape can be used for design; the waverider with the complicated plane shape is generated; and the waverider characteristic in the high-Mach range is improved.
Description
technical field [0001] The invention relates to the technical field of hypersonic vehicle design, and in particular relates to a method for designing a hypersonic vehicle close curved surface waverider. Background technique [0002] Compared with traditional layout forms such as wing-body combination and lift body, the waverider layout has a higher lift-to-drag ratio, and is easy to adopt the integrated design of airframe / propulsion system. The aerodynamic layout of similar waveriders. [0003] So far, the design methods of waveriders mainly include Λ-type waverider design method, conical flow waverider design method, close cone waverider design method, wedge-cone mixed flow waverider design method, constant / variable wedge angle waverider design method, etc. There are 6 types of configuration methods and inner cone / close inner cone waverider design methods. The basic flow field of these waverider design methods limits the shock section shapes that can be used for waverider...
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IPC IPC(8): B64F5/00
Inventor 蒋崇文高振勋李椿萱
Owner BEIHANG UNIV