Axial induced velocity calculation method of rotor system inducing flow field based on finite state
A technology of induced velocity and finite state, applied in the field of axial induced velocity calculation, which can solve the problem of difficult to take into account fast calculation and fast convergence at the same time.
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specific Embodiment approach 1
[0031]Specific implementation mode 1: This implementation mode is based on the calculation method of the axially induced velocity of the induced flow field of the rotor system based on the finite state. The specific process is as follows:
[0032] Step 1. Obtain the test point set in the elliptical coordinate system ν, η, the coordinates below;
[0033] Step 2. Set the maximum harmonic parameter N (the setting range is generally 8-15) according to the accuracy requirements and the actual situation, and solve the corresponding matrix parameters according to the maximum harmonic parameter, and according to the dynamic pressure coefficient of the sinusoidal component Dynamic pressure coefficient of cosine component and the corresponding matrix parameters, combined with equations (4), (5) to solve
[0034] The corresponding matrix parameter is [M c ], [M s ], [D c ], [D s ], [L c ], [L s ];
[0035] where [M c ], [M s ] represents the mass matrix of cosine and sine...
specific Embodiment approach 2
[0041] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in the step one, obtain the test point set above the rotor plane in the ellipse coordinate system ν, η, The coordinates below; the specific process is:
[0042] Taking the center of the rotor as the origin, establish as figure 1 In the Cartesian coordinate system shown, χ represents the wake inclination angle. Use the following formula to convert the coordinates in the Cartesian coordinate system to the coordinates in the elliptical coordinate system
[0043]
[0044]
[0045]
[0046] where r' 2 =x 2 +y 2 +z 2 , r' is the distance between the test point and the origin; x, y, z represent the coordinates of the test point set in the Cartesian coordinate system, ν, η, Represents the coordinates of the test point set in the ellipse coordinate system; where η=0 represents the circular area where the rotor is located.
[0047] Specific embodiment two: the differen...
specific Embodiment approach 3
[0135] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the value range of the maximum harmonic parameter N is generally 8-15.
[0136] Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.
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