----------------- FILE NUMBER 842----------------- 1. FLOW TITLE: CASE 8401; PEAKE, D. J., BRAKMANN, G., AND ROMESKIE, J. M., BOUNDARY LAYER IN ADVERSE PRESSURE GRADIENT. 2. REVISION DATE: OCTOBER 30, 1981. 3. EVALUATORS: RUBESIN, M. W., AND HORSTMAN, C. C., NASA AMES RESEARCH CENTER, MOFFETT FIELD, CA. 94035. 4. DATE AND LOCATION: 1970, NATIONAL RESEARCH COUNCIL, OTTAWA, CANADA. 5. ABSTRACT: MEASUREMENTS WERE MADE AT A MACH NUMBER OF 4 OF PRESSURE DISTRIBUTION, LOCAL SKIN FRICTION AND BOUNDARY-LAYER PROFILES ALONG THE INTERNAL SURFACE OF A PARALLEL, CIRCULAR CROSS-SECTION DUCT WHERE AN AXISYMMETRIC CENTER-BODY PROVIDED THE MEANS OF IMPOSING AN ADVERSE PRESSURE GRADIENT UPON THE TEST FLOW. THE STUDY WAS CONDUCTED IN THE NAE 5X5 FT, (1.524X1.524 M). WIND TUNNEL AT AN UNDISTURBED BOUNDARY-LAYER MOMENTUM-THICKNESS REYNOLDS NUMBER OF 1.1*10**4. 6. REFERENCES: PEAKE, D. J., BRAKMANN, G., AND ROMESKIE, J. M., "COMPARISONS BETWEEN HIGH REYNOLDS NUMBER TURBULENT BOUNDARY LAYER EXPERIMENTS AT MACH 4, AND VARIOUS RECENT CALCULATION PROCEDURES," AGARD-CP-93, 1972. FERNHOLZ, H. H., AND FINLEY, P. J., "A CRITICAL COMPILATION OF COMPRESSIBLE TURBULENT BOUNDARY LAYER DATA," AGARDOGRAPH 223, 1977 (FLOW 7102) 7. INSTRUMENTATION: STATIC PRESSURE ORIFICES AND THERMOCOUPLES WERE USED TO MEASURE WALL PRESSURE AND TEMPERATURE. PRESTON PROBES WERE USED TO OBTAIN SURFACE SKIN FRICTION. MEAN FLOW PROFILES WERE OBTAINED FROM PITOT PROBE SURVEYS ASSUMING CONSTANT STATIC PRESSURE AND A CROCCO PARABOLIC TEMPERATURE-VELOCITY DISTRIBUTION ACROSS THE BOUNDARY LAYER. 8. EXPERIMENTAL PARAMETERS: MINF = 3.9256 TT = 298.2 DEGREES K. TW = 278.0 DEGREES K. TINF = 73.05 DEGREES K. UINF = 672.7 M/SEC. PINF = 8.4874*10**3 N/M**2. DELTAINF = 0.00387 M. DELTAXINF = 0.00147 M. THETAINF = 0.000191 M. TEST SURFACE WALL RADIUS = 0.1145 M. THE INFINITY CONDITIONS ARE DEFINED AT X = 0.295 M. 9. MEASURED VARIABLES AND COORDINATE DEFINITION: THE X COORDINATE IS MEASURED IN THE STREAMWISE DIRECTION FROM THE MODEL LEADING EDGE. THE Y COORDINATE IS NORMAL TO THE TEST SURFACE. THE COMPILED FORM OF THE DATA ARE AS FOLLOWS: M MACH NUMBER. MD MACH NUMBER AT D. P STATIC PRESSURE, N/M**2. PD STATIC PRESSURE AT D, N/M**2. POD STAGNATION PRESSURE AT D, N/M**2. PW STATIC PRESSURE AT W, N/M**2. TOD STAGNATION TEMPERATURE AT D, DEGREES K. TO STAGNATION TEMPERATURE, DEGREES K. TW TEMPERATURE AT W, DEGREES K. TR RECOVERY TEMPERATURE, DEGREES K. TW/TR=TWR WALL RECOVERY TEMPERATURE RATIO. SW NUMBER INDICATING THE RELATIVE IMPORTANCE OF LONGITUDINAL CURVATURE IN A PRESSURE GRADIENT. RZ TRANSVERSE RADIUS OF CURVATURE. RED2W REYNOLDS NUMBER BASED ON D2,VISCOSITY TAKEN AT WALL. RED2D REYNOLDS NUMBER BASED ON D2,VISCOSITY TAKEN IN THE FREE-STREAM. D BOUNDARY LAYER THICKNESS SELECTED, M. D1 DISPLACEMENT THICKNESS. D2=THETA MOMENTUM DEFECT THICKNESS, M. D3 KINETIC ENERGY DEFECT THICKNESS. D4 TOTAL ENTHALPY DEFECT THICKNESS. D1K DISPLACEMENT THICKNESS, (RHO/RHOD = 1). D2K MOMENTUM DEFECT THICKNESS, (RHO/RHOD = 1). D3K KINETIC ENERGY DEFECT THICKNESS, (RHO/RHOD = 1). H12 SHAPE FACTOR, (D1/D2). H32 SHAPE FACTOR, (D3/D2). H42 SHAPE FACTOR, (D4/D2). H12K SHAPE FACTOR, (D1K/D2K). H32K SHAPE FACTOR., (D3K/D2K). CF SKIN FRICTION COEFFICIENT. CFE=CFD SKIN FRICTION COEFFICIENT AT D. CQ HEAT TRANSFER COEFFICIENT. U VELOCITY COMPONENT IN X-DIRECTION, M/SEC. UE=UD VELOCITY COMPONENT IN X-DIRECTION AT D, M/SEC. U/UE = U/UD NONDIMENSIONAL VELOCITY RATIO. THETA REFERENCE MOMENTUM THICKNESS, M. DELTAINF BOUNDARY LAYER THICKNESS, M. DELTAXINF PT2/P NONDIMENSIONAL PRESSURE RATIO. TO/TOD NONDIMENSIONAL TEMPERATURE RATIO. M/MD NONDIMENSIONAL MACH NUMBER RATIO. T/TD NONDIMENSIONAL TEMPERATURE RATIO. RHO/RHOD*(U/UD) NONDIMENSIONAL MASS FLUX * NONDIMENSIONAL VELOCITY. 10. MEASUREMENT UNCERTAINTIES: UNCERTAINTIES ESTIMATED FROM BASIC MEASUREMENT UNCERTAINTY PW = +/- 2% CFE = +/- 10% U = +/- 3% H = +/- 5% DUCT DIMENSIONS: WETTED TEST SURFACE LENGTH = 33.0 INCHES, (0.8382 M). INTERNAL DIAMETER OF COWL = 9.012 INCHES, (0.2289 M). 11. TAPE ORGANIZATION: THE TAPE IS A 2400 FOOT, 9 TRACK, ODD PARITY, PHASE ENCODED, UNLABELLED TAPE WRITTEN AT A DENSITY OF 1600 BITS PER INCH ACCORDING TO EBCDIC CODE. THE RECORD FORMAT IS FIXED AND BLOCKED; RECORD LENGTH = 80 BYTES; BLOCKSIZE = 8000 BYTES NORMALIZED DATA ARE CREATED FROM MEASURED DATA AS FOLLOWS: XNORM = (X - XMIN)/(XMAX - XMIN) NORMALIZED VALUES ARE INTEGERIZED BY MULTIPLYING BY 10000 AND ROUNDING UP OR DOWN TO THE NEAREST INTEGER. IXNORM = XNORM * 10000. THUS EACH NORMALIZED DATUM IS WRITTEN ONTO TAPE AS AN INTEGER VALUE BETWEEN 0 AND 10000. ALL NULL DATA ARE WRITTEN AS 20000 THE EQUATION DESCRIBING THE RELATION BETWEEN ACTUAL DATA AND THE NORMALIZED DATA ON TAPE IS X = XMIN + (((XMAX - XMIN) * IXNORM)/10000.) WHERE X, XMAX AND XMIN ARE REAL AND IXNORM IS INTEGER. FILE# NREC CONTAINS FORMAT COMMENTS 1 - TEXT FILE - CONTAINS ITEMS 1 TO 11 OF THIS WRITE-UP 2 63 Y,PT2/P,TO/TOD,M/MD, 4E13.6/ RECORDS 1&2 - MAXIMUM U/UD,T/TD, 3E13.6 VALUES RHO/RHOD*(U/UD). FOR X = 0.29515 M, PW = 8487.4 N/M**2, UD = 672.7 M/SEC,. MD = 3.9256, CFE = 0.00110, THETA = 0.000191 M, H = 7.937. Y,PT2/P,TO/TOD,M/MD, 4E13.6/ RECORDS 3&4 - MINIMUM U/UD,T/TD, 3E13.6 VALUES RHO/RHOD*(U/UD). Y,PT2/P,TO/TOD,M/MD, 7I6 RECORDS 5 - 63 U/UD,T/TD, NORMALIZED VALUES RHO/RHOD*(U/UD). 3 47 Y,PT2/P,TO/TOD,M/MD, 4E13.6/ RECORDS 1&2 - MAXIMUM U/UD,T/TD, 3E13.6 VALUES RHO/RHOD*(U/UD). FOR X = 0.52375 M, PW = 132700.0 N/M**2, UD = 526.7 M/SEC,. MD = 2.0752, CFE = 0.00142, THETA = 0.000299 M, H = 3.280. Y,PT2/P,TO/TOD,M/MD, 4E13.6/ RECORDS 3&4 - MINIMUM U/UD,T/TD, 3E13.6 VALUES RHO/RHOD*(U/UD). Y,PT2/P,TO/TOD,M/MD, 7I6 RECORDS 5 - 47 U/UD,T/TD, NORMALIZED VALUES RHO/RHOD*(U/UD). 4 64 Y,PT2/P,TO/TOD,M/MD, 4E13.6/ RECORDS 1&2 - MAXIMUM U/UD,T/TD, 3E13.6 VALUES RHO/RHOD*(U/UD). FOR X = 0.67615 M, PW = 151913.0 N/M**2, UD = 514.5 M/SEC,. MD = 1.9882, CFE = 0.00158, THETA = 0.000425 M, H = 2.967. Y,PT2/P,TO/TOD,M/MD, 4E13.6/ RECORDS 3&4 - MINIMUM U/UD,T/TD, 3E13.6 VALUES RHO/RHOD*(U/UD). Y,PT2/P,TO/TOD,M/MD, 7I6 RECORDS 5 - 64 U/UD,T/TD, NORMALIZED VALUES RHO/RHOD*(U/UD). A SAMPLE PROGRAM FOR READING FILE 3 AND PRINTING, IS SHOWN BELOW. THE JCL SHOWN IS FOR THE STANFORD CIT FACILITY. CHECK WITH YOUR OWN COMPUTER INSTALLATION FOR THE EXACT JCL NEEDED. //TAPE JOB BZC$NJ /*SETUP TAPE=1,INPUT=(LIBRARY NUMBER ASSIGNED TO TAPE) // EXEC FORTCG //FORT.SYSIN DD * C TO READ FILE 3 OFF TAPE C PRINT MAXIMAS AND MINIMAS OF ALL THE VARIABLES C PRINT NORMALIZED INTEGERIZED VALUES OF ALL THE VARIABLES. INTEGER Y(50),PT(50),TO(50),M(50),U(50),T(50),RHO(50) READ (23,30) YMAX,PTMAX,TOMAX,MMAX,UMAX,TMAX,RHOMAX READ (23,30) YMIN,PTMIN,TOMIN,MMIN,UMIN,TMIN,RHOMIN DO 10 I = 1, 43 10 READ (23,40) Y(I),PT(I),TO(I),M(I),U(I),T(I),RHO(I) WRITE (6,50) YMAX,PTMAX,TOMAX,MMAX,UMAX,TMAX,RHOMAX WRITE (6,50) YMIN,PTMIN,TOMIN,MMIN,UMIN,TMIN,RHOMIN DO 20 I = 1, 43 20 WRITE (6,60) Y(I),PT(I),TO(I),M(I),U(I),T(I),RHO(I) 30 FORMAT(4E13.6/3E13.6) 40 FORMAT(7I6) 50 FORMAT(1X,4E13.6/3E13.6) 60 FORMAT(1X,7I6) STOP END //GO.FT23F001 DD UNIT=T1600,VOI=SER=(TAPE LIBRARY NUMBER), // DISP=(OLD,KEEP),DCB=(RECFM=FE,LRECL=80,BLKSIZE=8000,DEN=3), // LABEL=(3,NI) // -------------- END OF FILE NUMBER 842------------- ----------------- FILE NUMBER 843----------------- 0.598680E-02 0.203090E 02 0.100000E 01 0.100000E 01 0.100000E 01 0.374099E 01 0.100000E 01 0.000000E 00 0.100000E 01 0.916440E 00 0.000000E 00 0.000000E 00 0.100000E 01 0.000000E 00 0 0 0 0 0 10000 0 381 824 3011 3213 5486 6989 1881 572 1209 3823 3768 6183 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