ASSPIN Users' Manual - CAFE Foundation

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NASA Contractor Report 4434Computational Methods in thePrediction of Advanced Subsonicand Supersonic Propeller InducedNoise--ASSPIN Users' ManualM. H. Dunn and G. M. TarkentonLockheed Engineering & Sciences CompanyHampton,VirginiaPrepared forLangley Research Centerunder CONTRACT NASI-19000National Aeronautics andSpace AdministrationOfficeof ManagementScientific and TechnicalInformation Program1992
Page 5 and 6: CONTENTSLIST OF FIGURES ...........
Page 7 and 8: SUMMARYThis document describes the
Page 9 and 10: nb'._7CRPcounter-rotationpropellerC
Page 11 and 12: 0 angle between _ and 77)" blade su
Page 13 and 14: surface integrals over the moving b
Page 15 and 16: with f = 0, k > 0 defining an open
Page 17 and 18: frame at all times. The angle betwe
Page 19 and 20: whereA21(r) = - SillCOr cos cor 0 ,
Page 21 and 22: 2_A -- C027?x,co2'z sin + (d - 3)co
Page 23 and 24: the approximation of g in the neigh
Page 25 and 26: (a) Blade DiscretizationN1SUB N1SUP
Page 27 and 28: computer execution time by approxim
Page 29 and 30: the user is interested in CRP predi
Page 31 and 32: appear on the left hand side of the
Page 33 and 34: Blade Geometry and Surface Pressure
Page 35 and 36: Table 3. Geometry and Loading Input
Page 37 and 38: T(1) = 0.0, ..., T(NTPTS) = 27r.If
Page 39 and 40: set to their default values(seeTabl
Page 41 and 42: 2500145io2000fllo. 1500n-THICKNESS
Page 43 and 44: 175014513.1250¢1:-'-, 750O_COIJJn,
Page 45 and 46: 6. Dunn, M. H. and Tarkenton, G. M.
Page 48: J7=:

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