1NASA CEA TutorialTimothe PourpointProblem TypesRocket ExamplesReferences2/15Online Access & Documentationhttp://www.grc.nasa.gov//!"Ae#/ceahat.htmCEA:$ calculates chemical e%uili#rium pro&uct concentrations$ &etermines thermo&'namic & transport properties2 supporting documents:1. Detaile& anal'ses o( chemical e%uili#rium calculations2. )ser manual an& program &escription*e%uest a &ownloa&+/15,nstallation OverviewDownloa& &esire& version -in&ows.!"A /), Downloa& consists o( the (ollowing (iles:1. !"Agui01ar.2ip2. !"A34ortran.2ip +. !"Ae5ec0win.2ip 6otes (rom: *ea&me7!"Agui0win.t5t,( 'our local s'stem has 6OT installe& the 8ava2 9D: -829D:.; 'ou must install the 8ava 2 *untime "nvironment -8*". which consists o( 8ava 717?+0win&ows0i5@A.e5e can #e &ownloa&e& (rom Bhttp://1ava.sun.com/12se/1.>/B (or 8ava2 9D: (rom 9un =icroso(t ,nc.The !"Ae5ec PacCage installation proce&ures (or in&ows:1. !reate the installation Director' on 'our local machine -e.g. mC&ir !:D!"Ae5ec.2. Downloa& all three E,P (iles an& the e5ecuta#le (ile into the 9A=" &irector' -e.g. c&!:D!"Ae5ec.+. )n2ip the 4ortran 9ource !o&e -!"A34ortran.2ip. an& save into the 9A=" &irector'.>. )n2ip the !"A /), "5ecution (ile-!"Ae5ec0win.2ip.an& save into the 9A=" &irector'.5. )n2ip the !"Agui 8A* (ile -!"Agui01ar.2ip. an& save into the 9A=" &irector'.A. Dou#le0clicC on the (ile -12re17>717?+0win&ows0i5@A. to install 8ava *untime "nvironment -8*". #' using the s'stem D"4A)FT &irector' -e.g. !:DProgram 4ilesD8ava 9o(tD8*"D1.>.G."5ecute the #atch (ile -!"Ae5ec0win.#at. (or using the (ile !"Agui.1ar.>/15Pro#lem T'pes -1/2.Assigned Temperature and Pressuretp!hemical e%uili#rium composition an& properties will #e calculate& (or selecte& temperatures an& pressures. Combustion !Ent"alpy and Pressure#"p"nthalp' hel& constant resulting in an a&ia#atic (lame temperature; e%uili#rium mi5ture properties an& composition.Assigned temperatures and $olumest$!hemical e%uili#rium composition an& properties are calculate& (or assigne& temperatures an& a set o( either assigne& speci(ic volumes or &ensities.Combustion !%nternal energy and $olumes#u$!hemical e%uili#rium composition an& properties are calculate& (or assigne& internal energies an& assigne& total reactant speci(ic volumes or &ensities. RocketrktTheoretical rocCet per(ormance parameters can #e calculate& (or:in(inite0area or (inite0area com#ustorschemical e%uili#rium (or all points or (ree2e composition a(tercom#ustion; throat; or an' e5it point.thermal transport properties 5/15Pro#lem T'pes -2/2.S"ock tubes"ock!alculates shocC properties in terms o( assigne& velocities.C"apman&'ou(uet detonationdet!hapman08ouguet &etonation properties are calculate& (or a set o( un#urne& gaseous reactants at assigne& temperatures an& pressures.Assigned entropy and pressuressp!onverges on #oth the gaseous an& con&ense& pro&ucts (or a reactant mi5ture with an assigne& entrop' an& set o( pressures.Assigned entropy and eit"er specific $olumes ordensitiess$!hemical e%uili#rium composition an& properties calculate& (or assigne&entrop' an& each assigne& total reactant speci(ic volume or &ensit'. A/15*ocCet Pro#lems%N)%N%TE&AREA C*+,-ST*RAll points are isentropic with respect to the com#ustion point.!an assume chemical e%uili#rium or pro&ucts (ro2en a(ter a speci(ie& point.4ree2e points selections are com#ustion; throat; or e5it1.)%N%TE&AREA C*+,-ST*R,n this cham#er com#ustion is anon0isentropic; irreversi#le process.During the #urning process; part o( theenerg' release& is use& to raise theentrop'; an& the pressure &rops."5pansion in the no22le is assume&to #e isentropic.!an onl' assume chemical e%uili#rium.G/15"5ample!ontinue with our e5ample (rom class:O5i&i2er: O2-l.4uel: !H>-l.Pc I 1??? psiO/4 I >.? -near stoichiometric.Ac/At I +.?Ae/At I 1?.?; 25.?; 5?.?@/15,nputs to "5ample -1/>.!licCNotes:1. =aCe sure all inputs are vali&ate& #' clicCing outsi&e o( input cells2. =aCe sure there is no space #e(ore an input Pro#lem Ta#J/15,nputs to "5ample -2/>.*eactant Ta#*eactant 9electorNotes:1. Propellants can #e in gaseous; con&ense& -soli&/li%ui&.; or atomic (orm2. )se the search (unction to %uicCl' (in& &esire& propellant1?/15Thermal transport properties are ver' use(ul (or calculations relate& to cooling re%uirements in cham#er or at no22le throat.Parameters t'picall' use& in Kart2 e%uation -*e(. +.:Output properties (rom !"A inclu&e:$ />.9ave input (ile -4ile; 9ave.