Design method of turbine transition channel integrated rectifying strut based on swirl angle inverse method
A technology of transition flow channels and design methods, applied in geometric CAD, special data processing applications, etc., can solve the problems of small calculation amount, long time consumption, low design efficiency, etc.
Inactive Publication Date: 2020-06-16
NORTHWESTERN POLYTECHNICAL UNIV
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[0004] In order to overcome the deficiencies of the existing technology and aim at the shortcomings of low design efficiency and long time-consuming of the traditional direct problem design method, the present invention develops an integrated rectifying strut design method based on the swirl angle inverse method, which has a small amount of calculation , strong purpose
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[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0038] The present invention takes the E3 engine Build1 turbine transition channel as an engineering example to implement the design and research of the integrated rectifying support plate. First, the initial design of the integrated rectifying strut is carried out to ensure that the flow rate is basically unchanged before and after the design. In order to satisfy the flow field at the outlet of the transition channel with the integrated strut and the outlet flow field of the prototype flow channel, the flow field developed by the present invention is adopted. The original design was modified by swirl angle inverse method. figure 1 It is a schematic diagram of the surface grid of the support plate of the present invention, figure 2 It is a schematic diagram of the channel of the support plate in any spanning section of the present invention, image 3...
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The invention provides a design method of a turbine transition passage integrated rectifier support plate based on a swirl angle inverse method. A 3-D airfoil shape design method is adopted for the initial design of the integrated support plate. On the basis of arbitrary spanwise cross-section supporting plate channel, the conservation equation of momentum moment is applied to the closed control body, the target load on the surface of the integrated support plate satisfying a predetermined outlet swirl angle is obtained, and further the geometry of the support plate is updated based on the inverse problem of the middle arc surface. An E3 engine build 1 turbine transition passage is designed with an integrated rectifier support plate. On the premise of keeping the aerodynamic performance ofthe design point basically unchanged, the outlet flow field parameters of the turbine transition passage with the integrated support plate are basically identical to those of the prototype turbine transition passage with low pressure guide vanes, and in particular, the outlet Mach number and outlet swirl angle distribution are basically identical.
Description
technical field [0001] The invention relates to the design field of a turbofan engine, in particular to a method for designing an integrated support plate. Background technique [0002] References "Marn A, E, Cadrecha D, et al.Shorten the Intermediate Turbine Duct Length by Applying an Integrated Concept[J].Journal of Turbomachinery,2009,131(4):1041-1051."Proposed the integrated design concept of the rectifying strut plate in the turbine transition channel , that is to replace the prototype rectifying strut and the first-stage guide vane of the low-pressure turbine with the newly designed strut, so that the turbine transition channel with integrated strut can be The downstream low-pressure turbine rotor provides suitable air intake conditions (suitable inlet airflow angle and inlet Mach number). The literature points out that the weight of the blade can be reduced by 20%-39% through the integrated design, but does not give the specific details of the integrated support pl...
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IPC IPC(8): G06F30/17G06F30/10
CPCG06F30/17
Inventor 吴虎侯朝山杨晨梁言刘昭威
Owner NORTHWESTERN POLYTECHNICAL UNIV