| 摘要 |
mechanical engineering; turbines. SUBSTANCE: proposed blade of gas turbine has shaped part consisting of suction face, pressure surface and edge contours. Contours of suction face and pressure surface of blade are formed by sinusoidal spirals, each point of spirals being defined by expression x = x0+ρ.cosΦ; y = y0+ρ.sinΦ, where . (x0, y0)- are coordinates of spiral pole; A is polar distance; alpha is angle between polar axis and axis OX; Φ is angle between perpendicular erected in arbitrary point of lemniscate and axis OX; Φ is point radius-vector; ρ is angle between radius-vector and axis OX; m is parameter defining type of curve. EFFECT: reduced energy losses in bladings, reduced time taken for shaping of blades, enlarged area of reliable designing of blades. 4 dwg
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