diff options
| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1955/CH5/EX5.17 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '1955/CH5/EX5.17')
| -rwxr-xr-x | 1955/CH5/EX5.17/example17.sce | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/1955/CH5/EX5.17/example17.sce b/1955/CH5/EX5.17/example17.sce new file mode 100755 index 000000000..738c74b14 --- /dev/null +++ b/1955/CH5/EX5.17/example17.sce @@ -0,0 +1,35 @@ +clc
+clear
+//input data
+T00=973//Total head inlet temperature in K
+P00=4.5//Total head inlet pressure in bar
+P2=1.6//Static head outlet pressure in bar
+m=20//Gas flow rate in kg/s
+a1=(90-28)//Nozzle outlet angle measured perpendicular to blade velocity in degree
+Dmh=10//Mean blade diameter to blade height ratio
+NLC=0.1//Nozzle loss coefficient
+Cp=1155.6//Specific heat of gas at a constant pressure in kJ/kg
+R=289//Gas constant in J/kg
+r=1.333//Ratio of specific heats of gas
+
+//calculations
+T2ss=T00*(P2/P00)^((r-1)/r)//Isentropic temperature at outlet in mid section in K here T00=T01
+T1s=T2ss//Isentropic temperature at inlet at mid section in K
+C1m=(2*Cp*(T00-T1s)/1.1)^(1/2)//Velocity of steam at exit from nozzle at mid section in m/s
+T1=T00-((C1m^2)/(2*Cp))//Gas temperature at mid section in K
+d=(P2*10^5)/(R*T1)//Density of gas in kg/m^3
+Rg=(Cp*(r-1)/r)//Gas constant of the gas in kJ/kg
+Ca=C1m*cosd(a1)//Axial velocity in m/s
+h=((m/(d*Ca))*(1/(Dmh*3.1415)))^(1/2)//Hub height in m
+Dm=Dmh*h//Mean blade diameter in m
+Dh=Dm-h//Hub diameter in m
+a1h=atand(((Dm/2)/(Dh/2))*tand(a1))//Discharge angle at hub in degree
+C1h=Ca/cosd(a1h)//Gas velocity at hub section in m/s
+T1h=T00-((C1h^2)/(2*Cp))//Gas temperature at hub in K here T01=T00
+Dt=Dm+h//Tip diameter in m
+a1t=atand(((Dm/2)/(Dt/2))*tand(a1))//Gas discharge angle at tip in degree
+C1t=Ca/cosd(a1t)//Gas velocity at tip in m/s
+T1t=T00-((C1t^2)/(2*Cp))//Gas temperature in K here T00=T01
+
+//output
+printf('(a)At mid section\n Gas velocity is %3.1f m/s\n Gas temperature is %3.1f K\n Gas discharge angle is %3i degree\n(b)At hub section\n Gas velocity is %3.1f m/s\n Gas temperature is %3.2f K\n Gas discharge angle is %3.2f degree\n(c)At tip section\n Gas velocity is %3.1f m/s\n Gas temperature is %3.2f K\n Gas discharge angle is %3.2f degree',C1m,T1,a1,C1h,T1h,a1h,C1t,T1t,a1t)
|