The Prediction of Helicopter Rotor Hover Performance using a ...

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Calculate coningangle and set up blade and wake coordinates Calculate wake velocity influence coefficients Store influence coefficients Set up circulation matrix and invert Calculate bound and trailing vortex strengths Calculate number of vortex filaments making up tip vortex Fig.3 contd Flow diagram of the performance calculation
Calculate wake induced velocity distribution Calculate interference velocities Has lood distribute .convergej ? O Output rotor performance Fig.3 concld Flow diagram of the performance calculation
Page 1: C.P. No. 1341 U PROCUREMENT EXECUTI
Page 4 and 5: CONTENTS 1 INTRODUCTION 3 2 DESCRIP
Page 6 and 7: studies, but the thrust to power re
Page 8 and 9: from strip element theory, where n.
Page 10 and 11: 8 The model rotor used in the exper
Page 12 and 13: 10 The roll up of the tip vortex is
Page 14 and 15: 12 T. = ipjc^n?. -c^u. Q. = ipL.^i-
Page 16 and 17: 14 u. L + 9. - a. + TT4- R i i fir^
Page 18 and 19: 16 strengths. Normally only two or
Page 20 and 21: 18 between two of the published cur
Page 22 and 23: 20 distribution measured near the t
Page 24 and 25: 22 and root cut out of the main rot
Page 26 and 27: 24 the complete range of thrust coe
Page 28 and 29: 26 provided that the two-dimensiona
Page 30 and 31: 28 a. blade incidence distribution
Page 32 and 33: 30 No_. 10 11 12 13 14 16 Author M.
Page 34 and 35: Shaft axis 0-2 0-4 z f 0-6 0-8 •0
Page 38 and 39: 001 I 0-010 0009 0-008 0-007 Torque
Page 40 and 41: Blode load hi/mm 7 o Flight test, t
Page 42 and 43: U*VJ 1 Q 001 5 0014 0-013 OO12 OOi
Page 44 and 45: Torque 0-008 0-007 0-0 06 coefficie
Page 46 and 47: 0-0007 00006 Power coefficient 0000
Page 48 and 49: 0' 10 0- 09 0-08 Thrust Coeff icien
Page 50 and 51: 0-0075 0-0070 0- 0065 0-0060 Torque
Page 52 and 53: 0-0075 0-0070 0*0065 0-0060 Torq,ue
Page 56: © Crown copyright 1976 Published b

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