Design method for embedded type air inlet lip
A technology of embedded air intake and design method, which is applied in the field of embedded air intake design, can solve the difficulty of constructing curved surfaces, the law of variable changes in the design of difficult lip curved surfaces, and the difficulty in designing embedded air intakes Lip and other problems to achieve the effect of improving reliability and convenience
Active Publication Date: 2017-04-05
BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH
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Problems solved by technology
It is difficult to summarize the design variables of the lip surface and their changing rules, so it is also difficult to design the embedded intake lip
Therefore, it is difficult to construct the surface, and it is difficult to construct it with a method or a surface
Method used
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[0035] Embodiments of the present invention will be described below with reference to the drawings. Elements and features described in one drawing or one embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that representation and description of components and processes that are not relevant to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions for the purpose of clarity.
[0036] refer to figure 1 , this embodiment provides a design method for a buried air intake lip, including:
[0037] Step S101, importing the body configuration of the fuselage and the configuration of the inner channel of the air inlet, intersecting the configuration of the inner channel of the inlet with the configuration of the fuselage to obtain the intersecting line of the front lip and the intersecting line of the rear lip, Determine the s...
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The invention provides a design method for an embedded type air inlet lip. By reasonably selecting the control point position on the inner channel central line of an air inlet, a datum line controlling the phase angle with the point in the horizontal direction can be obtained. By changing the phase angle, a series of datum planes can be obtained. Planar splines are constructed on the datum planes, the direction constraints of tangential vectors at spline end points and the spline shape change constraints are met, and thus the idea of the anar splines and splines is introduced into the lip shaping process. Design of the embedded type air inlet lip under the general condition can be completed well. Through a transition hook face completed through the method, the smooth transition of the lip with the machine body outer surface and the inner channel hook face of the air inlet can be ensured.
Description
technical field [0001] The invention relates to the technical field of embedded air intake design, in particular to a design method for the lip of an embedded air intake. Background technique [0002] The buried air intake is a special air intake that buries the inlet into the fuselage or wing without any protruding parts. Such a design can effectively reduce the windward area of the aircraft, reduce the windward resistance and the radar scattering cross-sectional area, and thus have better stealth performance. In addition to the above advantages, because it is integrated with the fuselage, the circumferential size of the aircraft can be relatively reduced, which is beneficial to the placement, carrying and box-type launch of the aircraft. The above-mentioned many advantages make the buried air intake more and more concerned by researchers at home and abroad. [0003] The lip modification of the embedded air intake, that is, the generation of the transition surface of th...
Claims
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Inventor 王元光周硕郭敬涛
Owner BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH