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Lecture_note3_chart - {in Two other dimensionless...

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Unformatted text preview: {in Two other dimensionless coefficients Pressure coefficient: C],=(p-pm}qu $ . Prifi-gmra Dd? ‘%WQS}YG W. Skin friction coefficient: Cf=rfqm {1.3 [H3 [14 Turbulent Trensenic Flewr past a RAE2822 airfoil Cemputulien -—|— Experiment X {3.012 Cumpulatien —¢— [LU] Experiment x flflflfl flflflfi - CLUB-4 {1.002 43.002 41mm ' 4:] DUE: 4111103 U {1.1 0.2 ['13 0.4 {1.5 [3.6 fl“? ISLE {3.9 I XII: L" Problem 4. A wedge—shaped airfoil has a Cp distribution as Shown in the Skeleh helnw. 1f the angle nf attack is 5 deg, determine {3.1. C;H Ca, Cd, and (Emu-4. Note that you need to find Cm“, and one way to determine this is from [3ng and C1. H i i Pre lem 4. ' A w dgeeihaped ail-fell has a Cp Ii' nihntien as shown in the sketch below. If the angle of attae is 5 K“: 0 deg, determine Cu, (2., CE, (3,, and' mm. Note that you need to find Cm“, and one we}; to detenn this 5 fl'flm CHILE and CL = ‘7'?! _ H Lfl —1_2 ; [tiger—Meg e9 distribution 9 t3 "tnfi‘l-ue ~Fit 055:: [I e- i—finfifi “FT “551 ‘J’J‘i [ND L Q . n-F C £L+L11JGKK+S Li-E-efljelx 12-13;. as ...
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