Method for edge strip shape modifying of front edge of end area blade of turbine
A blade leading edge, turbine technology, applied to blade support components, mechanical equipment, engine components, etc., can solve the problems of enhanced secondary flow and loss
Inactive Publication Date: 2014-05-14
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF9 Cites 17 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Klein [2] Endwall boundary layer distortion in turbines enhances secondary flow and losses, study suggests
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0031] In order to better illustrate the purpose, steps and effects of the present invention, the content of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0032] In this embodiment, an axial flow compressor blade is redesigned according to the method described in the content of the invention, and its effect is verified by a numerical method. The relevant aerodynamic parameters of this embodiment are as follows: the total inlet pressure is 101325 Pa, the incoming flow Mach number is 0.29, and the mainstream area is 48.185°.
[0033] Step 1. According to the original airfoil data, the geometric parameters of the cascade and the aerodynamic parameters, the shape of the original compressor blade is given, such as figure 1 shown;
[0034] Step 2, on the basis of step 1, select and implement the forward protruding area for the leading edge 1 of the original blade end wall. In this embodiment, the numerical si...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a method for edge strip shape modifying of a front edge of an end area blade of a turbine and belongs to the technical field of mechanical devices and transport. Shape modifying is realized by adopting a method of frontwards extending a sharp front edge at a blade close end wall area. The method includes selecting an area for implementing frontward front edge extending at the close end wall area on an original blade, and enabling the front edge after frontward extending to be a space curve; performing edge strip shape modifying on the end area blade to acquire a new blade; adopting a research method of parameterization of computational fluid dynamics to optimize the new step acquired in step 3. An airplane edge strip wing principle is imitated, the actual circumstance that a distorted boundary layer of the close end wall area of the turbine blade causes local large attach angle running is combined, and a novel technique for shape modifying of the front edge of the turbine blade is provided, so that end area flowing is enabled to be within a proper attack angle range, end wall area and angle area separation is reduced or eliminated, streaming of the turbine blade is effectively improved, and performance of the turbine is improved. The method is suitable for the fields of aviation, spaceflight, navigation and energy resource power.
Description
technical field [0001] The invention relates to a method for trimming the leading edge strip of a blade in an end region of a turbine, and belongs to the technical field of mechanical devices and transportation. Background technique [0002] The boundary layer in the end zone widely exists in the internal flow of the turbine. Due to the relative rotation of the rotor-stator blades, each row of blades almost accepts the velocity profile distortion of the end wall boundary layer, which means that in the end zone, the angle of attack of the incoming flow of the blade is usually very large, combined with the interaction with the blade surface boundary layer, It will lead to the worsening of the element flow in the end zone of the blade and the separation of the corner zone, resulting in greater flow loss and reduced margin. Many international studies have proved this point, for example, W.B.Roberts [1] Based on the design and test data of 12 sets of intermediate stage compress...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/14F04D29/26
Inventor 季路成伊卫林唐方明马伟涛
Owner BEIJING INSTITUTE OF TECHNOLOGYGY