Question

Question 1.4 A convergent-divergent nozzle is designed to operate with isentropic flow with an exit Mach number, Me. The flowin the nozzle is supplied from a reservoir of air with a static pressure ofPr and a static temperature of Tr and the nozzle has a throat area, AT, as specified in the table below Value Unit Design Data Exit Mach number (ME) 0.55 Area of throat (AT) 600 kPa Reservoir static pressure (PR) 380 WAT Reservoir static temperature (TR) kPa 550 UNIT EC Calculate Your answers a) The ratio Aexit / A* b) The exit area of the nozzle c) The exit pressure at which the nozzle will become choked kPa d) The mass flow rate, for exit pressure of 0 kPa kg/s e) The mass flow rate, for exit pressure PEc as given in the table kg/s

Answer 1

ne Güven to operate uith iser吻opic A Grueyget da exprt, nea ale is design d A Cenue fit an ezit och number IS S Static presuric leos in tho nosale is supplied Prom 2 Ahea of Threat Ar 0.55 EC Specipic haat coefficient 14 Section ectior AS 2 enaseic ezib Throot

Nouw toe dtoinine the yatio of Aeit lA* exit Bu substituting valu in above ion, e 1.4れ Cet) 0.5 3.6 2. 4 2 0.5 X 3.3 5 2 16895 Mou we calulohe exit ara of the noah. Peiul Area.of htoat is RT:0.55 n",g it ng valus uve 2204 1.6295 X 0.55 A, .. 0,9281 m2

ne 3 enuse che che d. dt is caltulabdhui the velation 2. Po nation pReune Resowoir Static preaue i.c 卩 0、528 x 600 exit preure of 0 kPa exit 0 Sec mo aoe caloulate the Poo oe Pay exit p reMare pre ure 2 Substitute sn aloove ト4 8.314 x 380

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