From 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 Mon Sep 17 00:00:00 2001
From: prashantsinalkar
Date: Tue, 10 Oct 2017 12:27:19 +0530
Subject: initial commit / add all books

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 3751/CH6/EX6.3/Ex6_3.sce | 52 ++++++++++++++++++++++++++++++++++++++++++++++++
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+//Fluid System By Shiv Kumar
+//Chapter 6 - Kaplan and Propeller Turbines
+//Example 6.3
+//To Find (a)Inlet and Outlet blade Angles  (b)Mechanical Efficiency  (c)Volumetric Efficiency
+
+     clc
+      clear
+      
+//Given:
+   D=6;    //Outer Diameter of Runner, m
+   d=2;    //Inner Diameter of Runner, m
+   P=30;   //Shaft Power, MW
+   N=75;   //Speed, rpm
+   H=12;   //Head, m
+   Q=310   //Discharge through the Runner, m^3/s
+   eta_H=96/100;  //Hydraulic Efficiency
+      
+//Data Required:
+   rho=1000;   //Density of Water, Kg/m^3
+   g=9.81;     //Acceleration due to gravity, m/s^2
+
+//Computations
+
+   u=%pi*D*N/60;     //Velocity of runner, m/s
+   ui=u;
+   uo=u;
+   Vf=Q/((%pi/4)*(D^2-d^2))     // m/s
+   Vfi=Vf;
+   Vfo=Vf;
+   Vwi=eta_H*g*H/ui;   // m/s  //The Answer Vary Because Value of ui used in book is Wrong
+
+//(a)Inlet and Outlet blade Angles, Beta_i and Beta_o
+
+    Beta_i=180-atand(Vfi/(ui-Vwi));   //Degrees
+    Beta_o=atand(Vfo/uo);    //Degrees
+
+//(b)Mechanical Efficiency,eta_m 
+   
+    eta_M=P*10^6/(rho*Q*Vwi*ui)*100;   //percentage(%)    //The Answer Vary Because Value of Vwi used in book is Wrong
+
+//(c)Volumetric Efficiency, eta_v
+
+   eta_o=P*10^6/(rho*Q*g*H)*100;    //Overall Efficiency, percentage(%)
+   eta_v=eta_o/(eta_M*eta_H);   //percentage(%)    //The Answer Vary Because Value of eta_m used in book is Wrong
+
+//Results
+
+  printf("(a)Inlet Blade Angle, Beta_i=%.2f degrees and \n",Beta_i)    //The answer vary due to round off error
+  printf("   Outlet Blade Angle, Beta_o=%.2f degrees \n",Beta_o)     //The answer vary due to round off error
+  printf("(b)Mechanical Efficiency, eta_m=%.2f percent\n",eta_M)     //The answer provided in the textbook is wrong
+  printf("(c)Volumetric Efficiency, eta_v=%.2f percent\n ",eta_o)    //The answer provided in the textbook is wrong
+
-- 
cgit