Problem 2.91[Difficulty: 3]Given:Data on airlinerFind:Sketch of speed versus altitude (M = const)Solution:Data on temperature versus height can be obtained from Table A.3At 5.5 km the temperature is approximately252KThe speed of sound is obtained fromwherek= 1.4R= 286.9J/kg·K(Table A.6)c= 318m/sWe also haveV= 700km/hrorV= 194m/sHence M= V/corM= 0.611To compute Vfor constant M, we useV= M·c= 0.611·cAt a height of 8 km:V= 677km/hrNOTE: Realistically, the aiplane will fly to a maximum height of about 10 km!z (km)T (K)c (m/s)V (km/hr)426232571352593227095256320
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This note was uploaded on 10/19/2011 for the course EGN 3353C taught by Professor Lear during the Fall '07 term at University of Florida.