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CN-118747389-B - Method, equipment and product for determining bionic wear-resistant wing profile

CN118747389BCN 118747389 BCN118747389 BCN 118747389BCN-118747389-B

Abstract

The application discloses a method, equipment and a product for determining a bionic abrasion-resistant wing profile, and relates to the technical field of bionic wing profiles, wherein the method comprises the steps of obtaining an image of a typical body state of a lizard when the lizard resists the strike of sand; determining a contour boundary of a typical body form according to an image of the typical body form, discretizing the contour boundary of the typical body form to obtain contour line feature points, dividing the contour boundary by utilizing the contour line feature points and bending features of the contour boundary, respectively adopting polynomials to carry out nonlinear smooth curve fitting on the contour line feature points of the division result, determining a suction surface contour and a pressure surface contour of the bionic abrasion-resistant airfoil form according to the fitting result, determining a bionic abrasion-resistant airfoil form according to the suction surface contour and the pressure surface contour, carrying out lofting processing by adopting three-dimensional design software according to the bionic abrasion-resistant airfoil form, and generating the bionic abrasion-resistant airfoil form. The application can change the striking mode of sand grains so as to improve the erosion resistance and abrasion resistance of the surface of the airfoil.

Inventors

  • DONG JING
  • Zhou Wangzi

Assignees

  • 长江水利委员会长江科学院

Dates

Publication Date
20260505
Application Date
20240704

Claims (6)

  1. 1. The method for determining the bionic wear-resistant airfoil profile is characterized by comprising the following steps of: The method comprises the steps of obtaining an image of a typical body state of a lizard when the lizard resists the strike of wind sand, wherein the typical body state is a body state after the lizard is adjusted when the sand grains strike the body surface of the lizard, and when the lizard is struck by windward sand, the head of the lizard is lifted and gradually bent towards the back direction until the head and the back form a specific radian; determining contour boundaries of the typical body form according to the image of the typical body form; Discretizing the contour boundary of the typical body state to obtain contour line characteristic points; Dividing the contour boundary by utilizing the contour line feature points and the bending features of the contour boundary; Respectively adopting polynomials to carry out nonlinear smooth curve fitting on contour line characteristic points of the division result; determining the suction surface profile and the pressure surface profile of the bionic abrasion-resistant airfoil according to the fitting result; Determining a bionic abrasion-resistant airfoil profile according to the suction surface profile and the pressure surface profile; the bionic abrasion-resistant wing profile is designed based on the contour line of the lizard in a typical body state, and the contour boundary of the lizard in the typical body state resisting the strike of sand is obtained by extracting the contours of the head, the back, the abdomen and the tail of the lizard in the incoming flow direction; the obtaining of the typical body state image of the lizard when the lizard resists the strike of the sand wind specifically comprises the following steps: The system comprises a heating system, an air supply system, a feeding system, a pipeline system, a dust removal system, a measurement control system and a moving system, wherein the wind-blown sand experimental platform can simulate a real desert wind-blown sand environment through adjustable temperature, adjustable wind speed and variable solid phase concentration; The control equation corresponding to the fitting result specifically comprises: y 1 =0,0≤x≤228.1 y 2 ＝7.69094583141533e -03 x 2 -3.52828148366162x+4.04638022616098e +02 ,228.1≤x≤253.3 y 3 ＝1.85071216823784e -05 x 5 -2.42784255067005e -02 x 4 +1.27369397544407e +01 x 3 -3.3402813229505e +03 x 2 +4.37900317097303e +05 x-2.295794028859e +07 ,253.3≤x≤275.0 y 4 ＝-1.09564078253634e -06 x 6 +1.72356438156742e -03 x 5 -1.12958252932075x 4 +3.94774499203293e +02 x 3 -7.75969019035025e +04 x 2 +8.13354506729073e +06 x -3.55177591961373e +08 ,253.3≤x≤275.0 y 5 ＝5.07846643505935e -10 x 6 -6.39291285802748e -07 x 5 +3.33906057351526e -04 x 4 -9.25752886825032e -02 x 3 +1.43613412541344e +01 x 2 -1.18119999888849e +03 x +4.02245116205783e +04 ,163.3≤x≤252.3 y 6 ＝6e -12 x 6 -3e -09 x 5 +4e -07 x 4 -3e -05 x 3 +0.001x 2 +0.038x+0.035,0≤x≤163.3 wherein y 1 、y 2 、y 3 、y 4 、y 5 and y 6 are control equations corresponding to fitting results, x is a coordinate point, y 1 、y 2 、y 3 is a control equation corresponding to a fitting curve of the tail lower side of the typical body state of lizard resisting the wind and sand striking, the head side of the abdomen is close to the head, and the jaw position of the head, and y 4 、y 5 、y 6 is a control equation corresponding to a fitting curve of the head upper side, the back side and the tail upper side of the typical body state of lizard resisting the wind and sand striking.
  2. 2. The method for determining a bionic wear resistant airfoil according to claim 1, wherein the determining a contour boundary of a typical body form from an image of the typical body form specifically comprises: establishing an x-y coordinate system by taking a starting point at the lower side of the tail of the lizard as an origin of coordinates in an image of a typical body state, and extracting characteristic points of contour lines of the head, the back, the abdomen and the tail in the incoming flow direction when the lizard is in the typical body state; And fitting the characteristic points by adopting a nonlinear smooth curve according to the characteristic points of the contour lines to obtain the contour boundary of the typical body state.
  3. 3. The method of determining a bionic anti-wear airfoil according to claim 1, wherein the maximum relative camber of the bionic anti-wear airfoil Maximum camber position Maximum relative thickness
  4. 4. A determining apparatus of a bionic wear-resistant airfoil profile for realizing the determining method of a bionic wear-resistant airfoil profile according to any one of claims 1 to 3, characterized in that the determining apparatus of a bionic wear-resistant airfoil profile comprises: the system comprises a typical body form image acquisition module, a characteristic body form display module and a display module, wherein the typical body form image acquisition module is used for acquiring an image of a typical body form of a lizard when the lizard resists the strike of sand, and the typical body form is an adjusted body form of the lizard when the sand strikes the body surface of the lizard; The contour boundary determining module is used for determining the contour boundary of the typical body state according to the image of the typical body state; the contour line feature point determining module is used for discretizing the contour boundary of the typical body state to obtain contour line feature points; the contour boundary dividing module is used for dividing the contour boundary by utilizing contour line characteristic points and the bending characteristics of the contour boundary; the curve fitting module is used for respectively adopting polynomials to carry out nonlinear smooth curve fitting on the contour line characteristic points of the division result; the suction surface profile and pressure surface profile determining module is used for determining the suction surface profile and the pressure surface profile of the bionic wear-resistant airfoil according to the fitting result; the airfoil profile determining module is used for determining a bionic abrasion-resistant airfoil profile according to the suction surface profile and the pressure surface profile; And the wing section generating module is used for carrying out lofting treatment by adopting three-dimensional design software according to the bionic wear-resistant wing section to generate the bionic wear-resistant wing section.
  5. 5. A computer device comprising a memory, a processor to store a computer program executable on the processor, wherein the processor executes the computer program to implement the method of determining a biomimetic anti-wear airfoil as claimed in any of claims 1 to 3.
  6. 6. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements a method of determining a bionic anti-wear airfoil according to any of claims 1-3.

Description

Method, equipment and product for determining bionic wear-resistant wing profile Technical Field The application relates to the technical field of bionic wing profiles, in particular to a method, equipment and a product for determining a bionic wear-resistant wing profile. Background In the fields of rotary machines and aviation, airfoils are the fundamental elements that constitute fluid-mechanical devices, and airfoil design directly affects the performance of the devices. Erosive wear is a phenomenon that causes loss of material from the surface of a fluid-mechanical device. When the equipment is operated in a sandy condition, the surface of the overcurrent part is inevitably subjected to serious erosion and abrasion damage, so that the deformation and the failure of the part are caused, and the economic loss is caused, and even the safety accident is induced. The conventional wear-resistant means comprise the steps of adopting wear-resistant materials, optimizing geometric parameters of parts, limiting the operation working conditions of equipment and the like, and meanwhile, the measures often have the defects of high cost or unfavorable for the efficient operation of the equipment. In recent years, along with the development of bionics, a plurality of researchers find that the body surface of the desert organism is hardly damaged, so that the desert organism has specific adaptation to sand erosion, and a new direction is provided for abrasion resistance research. At present, the research work on the erosion of the living organism against the wind sand takes a biological specimen as a research object, the structure morphology of the living organism is focused, but the research on the behavior of the living organism against the wind sand is still blank. The trendy and the avoidance are instincts of organisms, and through long-term natural selection, desert organisms can show a special behavior mode in a sand-blast environment besides evolving special morphological characteristics, so that the desert organisms can resist the sand-blast attack, and the behavior response is likely to be the optimal mode of the organisms for resisting the sand-blast attack. Therefore, in performing the bionic abrasion-resistant design, it is necessary to consider the behavioral response of desert organisms, aiming at the problems in the art. Disclosure of Invention The application aims to provide a method, equipment and a product for determining a bionic abrasion-resistant airfoil, which can change the striking mode of sand grains so as to improve the erosion and abrasion resistance of the surface of the airfoil. In order to achieve the above object, the present application provides the following solutions: in a first aspect, the present application provides a method for determining a bionic wear-resistant airfoil, the method for determining a bionic wear-resistant airfoil comprising: Acquiring an image of a typical body state of a lizard when the lizard resists the strike of wind sand, wherein the typical body state is the body state of the lizard after the lizard is adjusted when the sand grains strike the body surface of the lizard; determining contour boundaries of the typical body form according to the image of the typical body form; Discretizing the contour boundary of the typical body state to obtain contour line characteristic points; Dividing the contour boundary by utilizing the contour line feature points and the bending features of the contour boundary; Respectively adopting polynomials to carry out nonlinear smooth curve fitting on contour line characteristic points of the division result; determining the suction surface profile and the pressure surface profile of the bionic abrasion-resistant airfoil according to the fitting result; Determining a bionic abrasion-resistant airfoil profile according to the suction surface profile and the pressure surface profile; and according to the bionic wear-resistant airfoil profile, stretching treatment is performed by adopting three-dimensional design software, so as to generate the bionic wear-resistant airfoil. Optionally, the acquiring the image of the typical body state of the lizard when the lizard resists the strike of the sand blast specifically includes: And building a sand blowing experiment platform, wherein the sand blowing experiment platform is used for acquiring a behavior reaction image of the lizard in the sand blowing. Optionally, the determining the contour boundary of the typical body state according to the image of the typical body state specifically includes: establishing an x-y coordinate system by taking a starting point at the lower side of the tail of the lizard as an origin of coordinates in an image of a typical body state, and extracting characteristic points of contour lines of the head, the back, the abdomen and the tail in the incoming flow direction when the lizard is in the typical body state; And fitting the characteristic points by adopt