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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter 13: Hydraulic power transmission"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 13.1: ex_1.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"clc\n",
"//initialisation of variables\n",
"clear\n",
"nop= 0.88\n",
"nom= 0.88\n",
"Pm= 75 //hp\n",
"p= 3000 //lb/in^2\n",
"d= 54.5 //lbm/ft^3\n",
"u= 1.05*10^-4\n",
"d1= 0.5 //in\n",
"g= 32.2 //ft/sec^2\n",
"//CALCULATIONS\n",
"nt= (7/11)*nop*nom\n",
"pp= Pm/nt\n",
"Q= nop*pp*550/(p*144)\n",
"Re= 4*d*Q/(%pi*u*(d1/12)*g)\n",
"//RESULTS\n",
"printf ('n trans = %.3f ',nt)\n",
"printf ('\n Input power = %.f hp',pp)\n",
"printf ('\n Flow rate = %.3f ft^3/sec',Q)\n",
"printf ('\n Reynolds Number = %.1e ',Re)"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 13.2: ex_2.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"clc\n",
"//initialisation of variables\n",
"clear\n",
"lc= 0.25\n",
"a= 90 //degrees\n",
"p= 3000 //lb/in^2\n",
"g= 32.2 //ft/sec^2\n",
"d1= 0.5 //in\n",
"Q= 0.171 //ft^3/sec\n",
"d= 54.5 //lbm/ft^3\n",
"n1= 2 \n",
"n2= 6\n",
"lc1= 0.9\n",
"nop= 0.88\n",
"nom= 0.88\n",
"//CALCULATIONS\n",
"P1= 4*p*144/11\n",
"P2= 8*d*Q^2*(n1*lc+n2*lc1)/(%pi^2*(d1/12)^4*g)\n",
"pt= P1+P2\n",
"dpm= (p*144-pt)\n",
"ntrans= nop*nom*dpm/(p*144)\n",
"//RESULTS\n",
"printf ('Frictional pressure drop = %.2e lbf/ft^2',P1) \n",
"printf ('\n Extra Frictional pressure drop = %.2e lbf/ft^2',P2) \n",
"printf ('\n Total pressure drop = %.2e lbf/ft^2',pt)\n",
"printf ('\n Motor pressure drop = %.2e lbf/ft^2',dpm)\n",
"printf ('\n Overall transmission coefficiency = %.3f',ntrans)"
]
}
,
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 13.3: ex_3.sce"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": [
"clc\n",
"//initialisation of variables\n",
"clear\n",
"bip= 135 //degrees\n",
"bop= 150 //degrees\n",
"bot= 140 //degrees\n",
"bos= 137 //degrees\n",
"r= 1.8\n",
"r1= 1.8\n",
"r2= 0.7\n",
"r3= 0.95\n",
"//CALCULATIONS\n",
"R= (1+(cotd(bip)/cotd(bos)))*r^2-r1*(cotd(bop)/cotd(bos))\n",
"R1= r2*r3^2*(1+(cotd(bip)/cotd(bos)))-(cotd(bot)/cotd(bos))\n",
"R2= (R1-R)/(R-1)\n",
"//RESULTS\n",
"printf ('R1 = %.2f',R) \n",
"printf ('\n R2 = %.2f',R1) \n",
"printf ('\n Torque ratio = %.2f',R2) "
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Scilab",
"language": "scilab",
"name": "scilab"
},
"language_info": {
"file_extension": ".sce",
"help_links": [
{
"text": "MetaKernel Magics",
"url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
}
],
"mimetype": "text/x-octave",
"name": "scilab",
"version": "0.7.1"
}
},
"nbformat": 4,
"nbformat_minor": 0
}
|
