KR-20260062677-A - METHOD AND SYSTEM FOR DESIGNING MULTI-PRONGED INLET USING AREA LAW

KR20260062677AKR 20260062677 AKR20260062677 AKR 20260062677AKR-20260062677-A

Abstract

A method and system for designing a multi-branch suction port that adheres to the area rule are disclosed. The multi-branch suction port design method may include the steps of: designing the shapes of the inlet cross-section and the outlet cross-section of the multi-branch suction port; dividing the outlet cross-section according to the number of inlet cross-sections to determine a corresponding outlet cross-section corresponding to each of the inlet cross-sections; determining the parameters of the corresponding outlet cross-section and the parameters of an intermediate cross-section, which is a cross-section of the flow path between the inlet cross-section and the outlet cross-section in the multi-branch suction port, using the parameters of the inlet cross-section and the corresponding outlet cross-section; determining the position where the intermediate cross-section is placed on the multi-branch suction port based on the length of the multi-branch suction port, the distance between the origins of the intermediate cross-section, and the angle of the guide curve in the intermediate cross-section; determining the coordinates of the points of the arc included in each of the intermediate cross-sections according to the position and angle of the guide curve; and designing the overall shape of the multi-branch suction port according to the parameters of the inlet cross-section, the parameters of the corresponding outlet cross-section, the parameters of the intermediate cross-sections, the position where the intermediate cross-sections are placed, and the coordinates of the points of the arc.

Inventors

이수용
정석영

Assignees

국방과학연구소

Dates

Publication Date: 20260507
Application Date: 20241029

Claims (8)

Step of designing the shape of the inlet cross-section and outlet cross-section of a multi-branch suction port; A step of dividing the above-mentioned outlet cross-section according to the number of above-mentioned inlet cross-sections to determine a corresponding outlet cross-section corresponding to each of the above-mentioned inlet cross-sections; A step of determining the parameters of an intermediate cross-section, which is a cross-section of the flow path between the inlet cross-section and the outlet cross-section in the multi-branch suction port, using the parameters of the inlet cross-section and the corresponding outlet cross-section; A step of determining the position where an intermediate cross-section is placed on the multi-branch suction port based on the length of the multi-branch suction port, the distance between the intermediate cross-section origins, and the angle of the guide curve in the intermediate cross-section; A step of determining the coordinates of points of the arc included in each of the intermediate cross-sections according to the position and angle of the above-mentioned induction curve; and A step of designing the overall shape of the multi-branch suction port according to the parameters of the inlet cross-section, the parameters of the corresponding outlet cross-section, the parameters of the intermediate cross-sections, the positions where the intermediate cross-sections are arranged, and the coordinates of the points of the arc. A multi-branch intake design method including
In paragraph 1, The step of determining the parameters of the above intermediate cross-section is, A step of dividing the inlet section and the corresponding outlet section, which are composed of a single closed curve, to set the inlet divided sections and the outlet divided sections; A step of determining parameters of the inlet and outlet segmented sections using arcs constituting the inlet and outlet segmented sections; A step of determining the parameters of the inlet section and the corresponding outlet section using the parameters of the inlet section and the outlet section; and A step of determining the parameters of the intermediate cross-section using the parameters of the inlet cross-section and the corresponding outlet cross-section. A multi-branch intake design method including
In paragraph 2, The step of setting the above-mentioned inlet split section and outlet split section is, A multi-branch suction port design method in which the inlet and outlet segmented sections are divided based on points on curves perpendicular to straight lines of 0, 90, 180, and 270 degrees at the inlet and outlet segmented sections, and the inlet and outlet segmented sections are configured as a plurality of arcs designed to be continuously connected and in contact with each other.
In paragraph 2, The step of determining the parameters of the inlet split section and the outlet split section is, A multi-branch suction port design method for determining parameters of the inlet and outlet segmented sections, including the width, height, and area of the inlet and outlet segmented sections, using the length and angle of the arcs constituting the inlet and outlet segmented sections.
In paragraph 2, The step of determining the parameters of the above-mentioned inlet cross-section and the above-mentioned corresponding outlet cross-section is, A step of nondimensionalizing the width, height, and area of the above-mentioned inlet and outlet split sections into arc lengths; A step of determining the width and height of the inlet and outlet segmented sections by adjusting the arc length of each of the inlet and outlet segmented sections based on the dimensionless width and height; and When combining the above-mentioned inlet segmented cross sections and outlet segmented cross sections, the step of determining the area of the inlet cross section and the corresponding outlet cross section using the area of the central overlapping region where multiple inlet segmented cross sections and outlet segmented cross sections overlap, and the area of each of the inlet segmented cross section and the outlet segmented cross section. A multi-branch intake design method including
In paragraph 2, The step of determining the parameters of the above intermediate cross-section is, A step of determining the area of the intermediate cross-section by interpolating between the area of the inlet cross-section and the area of the corresponding outlet cross-section; A step of determining the perimeter of the central rectangle of the intermediate cross-section by interpolating between the perimeter of the central rectangle of the inlet cross-section and the perimeter of the central rectangle of the corresponding outlet cross-section; A step of determining the total length of the arc of each of the intermediate divided sections based on the area of the intermediate section, the perimeter of the central rectangle of the intermediate section, and the sum of the widths and heights of the intermediate divided sections; and A step of determining parameters of the intermediate cross-section, including the width of the intermediate cross-section, the height, the perimeter, the area of the intermediate cross-section, the perimeter of the central rectangle of the intermediate cross-section, and the total length of the arcs of each of the intermediate divided cross-sections. A multi-branch intake design method including
In paragraph 1, The step of designing the overall shape described above is, A step of creating a surface between the points of the arc based on the coordinates of the points of the arc to create a flow path between the inlet cross-section and the outlet cross-section; A step of verifying whether flow paths connecting all inlet cross-sections to corresponding outlet cross-sections have been created; If there is a flow path among the inlet cross-sections for which a flow path connecting to a corresponding outlet cross-section has not been created, the step of creating the flow path is repeated until flow paths connecting to a corresponding outlet cross-section are created in all inlet cross-sections; and When channels connecting from all inlet cross-sections to corresponding outlet cross-sections are created, the step of determining the overall shape of a multi-branched suction port by combining said channels. A multi-branch intake design method including
In Paragraph 7, The step of designing the overall shape described above is, A step of separating the exit cross-sections from the end of the guide curve toward the direction of the inlet cross-section, and generating a confluence shape of the section where the said flow paths are combined based on the separated exit cross-sections; Includes more, The step of determining the overall shape of the multi-branched suction port is, A step of combining the above-mentioned channels according to the above-mentioned joining shape; A step of generating a circular sketch in contact with the intake surface in the combined Euro; and A step of determining the section where the flow paths merge in the overall shape of the multi-branch intake port by correcting the corresponding section according to the circular sketch. A multi-branch intake design method including

Description

Method and System for Designing Multi-Pronged Inlet Using the Area Law The present invention relates to a method and system for designing a multi-branch intake port, and more specifically, to a method and system for designing a multi-branch intake port in which the total cross-sectional area changes continuously by applying the area rule. A multi-pronged intake is a design where multiple inlets lead to a single outlet, and many aircraft, such as the F-35, adopt this type of intake. Therefore, there is a need for effective design methods for this multi-pronged intake. In the multi-branch intake design method, since the intake connects multiple inlets to a single outlet, the outlet cross-section is divided into as many segments as the inlet cross-sections, and each intake is designed by matching the inlets and outlets one-to-one. At this time, the conventional multi-branch intake design method used a multi-arc construction method to derive the overall shape of the intake using the radius or curvature of the arcs constituting the inlet and outlet cross-sections. However, the multi-arc construction method using the radius or curvature of the arcs cannot simultaneously represent straight lines and points, which limits the free representation of shapes; thus, in the case of a bifurcated intake where two inlets face a circular outlet cross-section, there was a problem in that it could not represent the divided fan-shaped outlet cross-section. Therefore, there is a demand for a design method capable of designing multi-branched suction ports included in various shapes that cannot be expressed by multi-arc construction methods using arc radii or curvature. FIG. 1 is a drawing illustrating a multi-branch suction port design system according to an embodiment of the present invention. FIG. 2 is an example of setting divided cross-sections in an embodiment of the present invention. FIG. 3 is an example in which each of the divided cross-sections in an embodiment of the present invention is configured as a multiple arc. FIG. 4 is an example of a morphing parameter used in an embodiment of the present invention. FIG. 5 is an example of the arrangement of an induction curve and an intermediate cross-section according to the same used in an embodiment of the present invention. FIG. 6 is an example of an intersection point between a guide curve and an intermediate cross-section determined according to an embodiment of the present invention. FIG. 7 is an example of the process of designing a multi-branch suction port according to an embodiment of the present invention. FIG. 8 is an example of a flow path between an inlet cross-section and an outlet cross-section generated based on the coordinates of points of an arc according to an embodiment of the present invention. Figure 9 is an example of the overall shape of a multi-branched suction port created by combining several of the Euros of Figure 8. FIG. 10 is an example of a circular sketch for a confluence shape in a multi-branch suction port according to an embodiment of the present invention. FIG. 11 is an example of a confluence shape of a multi-branch suction port according to an embodiment of the present invention. FIG. 12 is an example of a double-branched suction port designed according to an embodiment of the present invention. FIG. 13 is an example of a quadruple-branch suction port designed according to an embodiment of the present invention. FIG. 14 is a flowchart illustrating a multi-branch suction port design method according to an embodiment of the present invention. FIG. 15 is a flowchart illustrating the intake design process of a multi-branch intake design method according to an embodiment of the present invention. Hereinafter, embodiments are described in detail with reference to the attached drawings. However, various modifications may be made to the embodiments, and thus the scope of the patent application is not limited or restricted by these embodiments. It should be understood that all modifications, equivalents, and substitutions to the embodiments are included within the scope of the rights. The terms used in the embodiments are for illustrative purposes only and should not be interpreted as intended to be limiting. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. In addition, when describing with reference to the attached drawings, identical components are assigned the same reference numeral regardless of drawing symbols, and redundant descriptions thereof are omitted. In describing the embodiments, if it is determined that a