High-efficiency lift-drag ratio wing section of axial flow fan
阅读说明：本技术 一种轴流风机的高效升阻比翼型 (High-efficiency lift-drag ratio wing section of axial flow fan ) 是由 张森 张新民 张安超 曾继来 朱崎峰 于 2020-07-22 设计创作，主要内容包括：本发明具体涉及一种轴流风机的高效升阻比翼型,包括前缘1、后缘2、吸力面3和压力面4；翼型的弦长为前缘1和后缘2的连线距离,翼型的型线由吸力面3和压力面4构成。翼型的关键数据为：翼型的前缘半径为0.9236%；翼型的后缘厚度为0.978%；翼型的最大相对厚度为12.66%；翼型的最大厚度相对弦长的位置为25.7%；翼型的最大相对弯度为3.62%；翼型的最大弯度相对弦长的位置为40.6%。本发明实施例的工作雷诺数范围是100,000~1,000,000,该翼型具有较宽的高效升阻比范围,使轴流风机在不同的工况条件下,均有较高的工作效率,实现了轴流风机的节能降耗。(The invention relates to a high-efficiency lift-drag ratio wing section of an axial flow fan, which comprises a front edge 1, a rear edge 2, a suction surface 3 and a pressure surface 4; the chord length of the airfoil is the connecting line distance of the front edge 1 and the rear edge 2, and the profile line of the airfoil is composed of a suction surface 3 and a pressure surface 4. The key data for the airfoil profile are: the leading edge radius of the airfoil is 0.9236%; the trailing edge thickness of the airfoil is 0.978%; the maximum relative thickness of the airfoil is 12.66%; the position of the maximum thickness of the airfoil relative to the chord length is 25.7 percent; the maximum relative camber of the airfoil is 3.62%; the maximum camber of the airfoil is 40.6% at the position of the chord length. The working Reynolds number range of the embodiment of the invention is 100,000-1,000,000, and the airfoil has a wider high-efficiency lift-drag ratio range, so that the axial flow fan has higher working efficiency under different working conditions, and the energy conservation and consumption reduction of the axial flow fan are realized.)
1. The utility model provides an axial fan's high-efficient lift-drag ratio wing section which characterized in that: the leading edge (1) radius of the airfoil is 0.9236%; the thickness of the trailing edge (2) of the airfoil is 0.978%; the maximum relative thickness of the airfoil is 12.66%; the position of the maximum thickness of the airfoil relative to the chord length is 25.7%; the maximum relative camber of the airfoil is 3.62%; the maximum camber of the airfoil is 40.6% relative to the chord length.
2. The airfoil of axial flow fan according to claim 1, characterized in that: the chord length of the airfoil is defined as 1, and then the coordinates of the suction surface and the pressure surface of the airfoil are as follows:
。
Technical Field
The invention relates to the technical field of fan design, in particular to a high-efficiency lift-drag ratio wing section of an axial flow fan.
Background
The fan is used as general mechanical equipment and widely applied to departments of petroleum, chemical engineering, national defense and the like, and the tiny improvement of the performance of the fan brings huge benefits for energy conservation and environmental protection. The blade is the main part that axial fan carries out energy conversion, and the wing section is the basis of axial fan blade design, and the quality of its aerodynamic performance plays crucial effect to axial fan performance.
Common wing profiles used in the design of axial flow fans at home and abroad include RAF-6E wing profile, Clark-Y wing profile, LS wing profile, arc plate wing profile and the like. Currently, the use of these airfoils in axial flow fan design is still very active and can achieve good results. However, with the development of science and technology, modern high-performance airfoils are continuously updated, and the use of the high-performance airfoils hopes to further improve the design level of the axial flow fan. In order to adapt to the condition that the axial flow fan can output energy efficiently under different working conditions, the wing profile needs to have an efficient lift-drag ratio under different attack angles, namely, the wing profile has a wider efficient lift-drag ratio range. Meanwhile, the wing profile keeps a larger lift coefficient under the working condition of a large attack angle, so that the surge margin can be improved, and the working reliability of the axial flow fan is enhanced.
Disclosure of Invention
The invention aims to provide a high-efficiency lift-drag ratio wing section of an axial flow fan.
The technical scheme of the invention is as follows: a high-efficiency lift-drag ratio wing section of an axial flow fan comprises a front edge, a rear edge, a suction surface and a pressure surface; the chord length of the airfoil is the connecting line distance between the front edge and the rear edge, and the profile line of the airfoil is composed of a suction surface and a pressure surface.
Further, the leading edge radius of the airfoil is 0.9236%.
Further, the trailing edge thickness of the airfoil is 0.978%.
Further, the maximum relative thickness of the airfoil is 12.66%.
Further, the maximum thickness of the airfoil is 25.7% relative to the chord length.
Further, the maximum relative camber of the airfoil is 3.62%.
Further, the maximum camber of the airfoil is 40.6% relative to the chord length.
The invention has the beneficial effects that:
1. the invention has wider high-efficiency lift-drag ratio range, ensures that the axial flow fan has higher working efficiency under different working conditions, and realizes the energy conservation and consumption reduction of the axial flow fan.
2. Under the working condition of a large attack angle, the axial flow fan can still maintain a higher lift coefficient, improves the surge margin of the axial flow fan and enhances the working stability.
3. The invention is more in line with the streamline, has small air flow separation loss, reduces aerodynamic noise and reduces the noise of the axial flow fan.
Drawings
FIG. 1 is a line graph of an embodiment of the present invention;
FIG. 2 is a graph of lift coefficient versus angle of attack for an embodiment of the present invention;
FIG. 3 is a plot of coefficient of drag versus angle of attack for an embodiment of the present invention;
FIG. 4 is a lift-to-drag ratio versus angle of attack diagram for an embodiment of the present invention.
Detailed Description
The high-efficiency lift-drag ratio airfoil of the axial flow fan shown in fig. 1 to 4 comprises a
the leading edge radius of the airfoil is 0.9236%;
the trailing edge thickness of the airfoil is 0.978%;
the maximum relative thickness of the airfoil is 12.66%;
the position of the maximum thickness of the airfoil relative to the chord length is 25.7 percent;
the maximum relative camber of the airfoil is 3.62%;
the maximum camber of the airfoil is 40.6% at the position of the chord length.
The working Reynolds number range of the embodiment of the invention is 100,000-1,000,000.
The embodiment of the invention has good lift performance, improves the surge margin of the axial flow fan and enhances the working stability of the axial flow fan.
The embodiment of the invention has lower resistance coefficient in a large attack angle range, reduces the separation loss of airflow, reduces aerodynamic noise and improves the noise performance of the axial flow fan.
The embodiment of the invention has a wider high-efficiency lift-drag ratio range, improves the working efficiency of the axial flow fan under different working conditions, and realizes energy conservation and consumption reduction of the axial flow fan.
The airfoil coordinate values of the embodiment of the invention are as follows:
suction surfacexCoordinates of the object
Suction surfaceyCoordinates of the object
Suction surfacexCoordinates of the object
Suction surfaceyCoordinates of the object
Pressure surfacexCoordinates of the object
Pressure surfaceyCoordinates of the object
Pressure surfacexCoordinates of the object
Pressure surfaceyCoordinates of the object
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