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Diffstat (limited to '3751/CH12/EX12.7')
| -rw-r--r-- | 3751/CH12/EX12.7/Ex12_7.sce | 67 | ||||
| -rw-r--r-- | 3751/CH12/EX12.7/Ex12_7_Indicator_Diagram.jpg | bin | 0 -> 201063 bytes |
2 files changed, 67 insertions, 0 deletions
diff --git a/3751/CH12/EX12.7/Ex12_7.sce b/3751/CH12/EX12.7/Ex12_7.sce new file mode 100644 index 000000000..b7503f450 --- /dev/null +++ b/3751/CH12/EX12.7/Ex12_7.sce @@ -0,0 +1,67 @@ +//Fluid Systems - By- Shiv Kumar +//Chapter 12- Reciprocating Pumps +//Example 12.7 +//To Calculate (a)The Absolute Head in the Pump corresponding to the four corners of the cord and also the mid strokes (b)The Work done/minute. + + clc + clear + +//Given Data:- + D=125; //Bore of the Pump, mm + L=125; //Stroke length, mm + N=30; //Speed of Pump, rpm + H_s=3; //Suction Head, m + H_d=15; //Delivery Head, m + d_s=62.5; //Diameter of Suction Pipe, mm + d_d=d_s; //Diameter of Delivery Head + l_d=18; //Length of Delivery Pipe, m + l_s=l_d; //Length of Suction Pipe + f=0.032; //Co-efficient of friction for both Pipes + + +//Data Used:- + g=9.81; //Acceleration due to gravity, m/s^2 + rho=1000; //Density of water, kg/m^3 + H_a=10.2; //Atmospheric Pressure Head, m of water + +//Computations:- + D=D/1000; //m + L=L/1000; //m + d_s=d_s/1000; //m + d_d=d_d/1000; //m + + a=(%pi/4)*d_s^2; //m^2 + A=(%pi/4)*D^2; //m^2 + omega=2*%pi*N/60; //rad/s + r=L/2; //m + + H_as=(l_s/g)*(A/a)*omega^2*r; //m + h_fs_max=f*(l_s/d_s)*(1/(2*g))*((A/a)*omega*r)^2; //m + //As Pipes are of same diameter and length, + H_ad=H_as; + h_fd_max=h_fs_max; + + H_m=H_a-H_s-H_as; //Pressure Head at 'm' , m of water + H_r= H_a-H_s-h_fs_max ; //Pressure Head at 'r' , m of water + H_n=H_a-H_s+H_as ; //Pressure Head at 'n' , m of water + H_at_s= H_a+H_s+H_as ; //Pressure Head at 's' , m of water + H_o=H_a+H_d+h_fd_max ; //Pressure Head at 'o' , m of water + H_q=H_a+H_d+H_ad ; //Pressure Head at 'q' , m of water + + m=rho*A*L*N*2/60; //mass of water/s, kg/s + Work_s=m*g*(H_s+H_d+(2/3)*h_fs_max+(2/3)*h_fd_max); //Word done/s, W + Work_m=Work_s*60; //Work done/min. , J/min + +//Results:- + printf("Pressure Head at m =%.2f m of water\n ",H_m) //The answer vary due to round off error + printf("Pressure Head at r =%.3f m of water\n ",H_r) //The answer vary due to round off error + printf("Pressure Head at n =%.2f m of water\n ",H_n) //The answer provided in the textbook is wrong + printf("Pressure Head at s =%.2f m of water\n ",H_at_s ) //The answer provided in the textbook is wrong + printf("Pressure Head at o =%.3f m of water\n ",H_o) //The answer vary due to round off error + printf("Pressure Head at q =%.2f m of water\n\n ",H_q) //The answer provided in the textbook is wrong + + printf("Work done/s=%.1f W \n Work done/minute=%.2f J/min. \n",Work_s,Work_m) //The answer provided in the textbook is wrong + + + + diff --git a/3751/CH12/EX12.7/Ex12_7_Indicator_Diagram.jpg b/3751/CH12/EX12.7/Ex12_7_Indicator_Diagram.jpg Binary files differnew file mode 100644 index 000000000..efa8ec78c --- /dev/null +++ b/3751/CH12/EX12.7/Ex12_7_Indicator_Diagram.jpg |
