Supersonic nozzle expansion section inner profile curve design method

A technology of curve design and expansion section, which is applied in the field of surface curve design in the expansion section of supersonic nozzles, can solve the problems of short nozzle expansion section length and limited controllable parameters, and achieve controllable design length, good aerodynamic performance, Solve the effect that the length of the expansion section of the nozzle is too short

Active Publication Date: 2019-10-15
北京零壹空间电子有限公司
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Problems solved by technology

[0006] The main purpose of this application is to provide a method for designing the profile curve in the expansion section of a supersonic nozzle to solve the problem that the length of the expansion section of the nozzle is too short due to the limited controllable parameters of the three-stage expansion section curve

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  • Supersonic nozzle expansion section inner profile curve design method
  • Supersonic nozzle expansion section inner profile curve design method
  • Supersonic nozzle expansion section inner profile curve design method

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Embodiment Construction

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0021] It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances for...

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Abstract

The invention discloses a supersonic nozzle expansion section inner profile curve design method. The supersonic nozzle expansion section inner profile curve design method comprises the following steps: acquiring design parameters of an inner profile of an expansion section of the supersonic nozzle; determining a front-section arc according to the design parameters; setting a quintic polynomial anda calculation condition of the quintic polynomial; substituting the calculation conditions and the design parameters into a quintic polynomial to obtain a rear-section curve; and according to the front-section arc and the rear-section curve, obtaining an expansion section inner profile curve. The supersonic nozzle expansion section inner profile curve design method solves the problem that the length of the expansion section of the spray pipe is too short due to the fact that controllable parameters of a third-order expansion section curve are limited, and can keep good aerodynamic performance.

Description

technical field [0001] The present application relates to the field of supersonic nozzles, and in particular, to a method for designing a profile curve in an expansion section of a supersonic nozzle. Background technique [0002] The surface engineering design methods in the expansion section of the supersonic nozzle include: double arc method, parabola method, third-order curve optimization method, etc., among which the third-order curve optimization method is the most commonly used. [0003] The third-order curve optimization method actually uses the combination of the front arc + the back cubic polynomial curve. Among them, the constant coefficient of the cubic polynomial curve is determined by four solution parameters: the coordinates of the starting point of the curve, the coordinates of the ending point, the first-order reciprocal at the starting point, and the first-order reciprocal at the end point. In particular, it is defined that the curve when the coefficient of...

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Application Information

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IPC IPC(8): G06F17/50G06F17/12
CPCG06F17/12G06F2111/06G06F2113/14G06F30/17Y02T90/00
Inventor 赵龙陈伟马超舒畅王坤良周志赜
Owner 北京零壹空间电子有限公司
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