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METHOD FOR CALCULATING CHARACTERISTIC CURVE OF CENTRIFUGAL FLUID MACHINE BY COMPUTER
METHOD FOR CALCULATING CHARACTERISTIC CURVE OF CENTRIFUGAL FLUID MACHINE BY COMPUTER
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机译:计算机计算离心机特性曲线的方法
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摘要
Method for calculating one of the characteristic curves of a centrifugal fluid machine, such as a Q-H characteristic curve, a Q-E characteristic curve, and a Q-NPSH characteristic curve by using a computer. A characteristic curve Y3 passing another point (x 3, y 3) and expressed by a high-degree expression Y3-=b 1+b 2x+b 3x 2+...+b nx (n-1) is defined by using two desired characteristic curves Y1, Y2 of a centrifugal fluid machine expressed by high-degree expressions Y1=a 1 1+a 1 2x+a+1+3x 2+...+a 1 nx (n-1) and Y2=a 2 1+a 2 2x+a 2 3x 2+...+a 2 nx (n-1). The point (x 3, y 3) is not on the two characteristic curves Y1, Y2. The characteristic curve Y3 is defined using an expression b n={a 1 nkh 1(1/kq 1) (n-1)x(y3-y2)/(y1-y2)}+{a2nkh2(1/kq2)(n-1)x(y1-y3)/(y1-y2)} by selecting a predetermined point (x 1, y 1) on the characteristic curve Y1 and a predetermined point (x 2, y 2) on the characteristic curve Y2 corresponding to the point (x 1, y 1).
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机译:用于通过使用计算机来计算离心流体机械的特性曲线之一的方法,例如Q-H特性曲线,Q-E特性曲线和Q-NPSH特性曲线。定义了通过另一个点(x 3,y 3)并由高阶表达式Y3- = b 1 + b 2x + b 3x 2> + ... + b nx(> n-1)表示的特性曲线Y3通过使用高阶表达式Y1 = a 1 1 + a 1 2x + a + 1 + 3x 2> + ... + a 1 nx(> n-1)表示的离心流体机械的两个所需特性曲线Y1,Y2 ),Y2 = a 2 1 + a 2 2x + a 2 3x 2> + ... + a 2 nx(> n-1)。点(x 3,y 3)不在两条特性曲线Y1,Y2上。使用表达式bn = {a 1 nkh 1(1 / kq 1)(> n-1)x(y3-y2)/(y1-y2)} + {a2nkh2(1 / kq2)( n-1)x(y1-y3)/(y1-y2)}通过选择特性曲线Y1上的预定点(x 1,y 1)和特性曲线Y2上的预定点(x 2,y 2)对应于点(x 1,y 1)。
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