----------------- FILE NUMBER 902----------------- 1. FLOW TITLE: CASE 8411; ZWARTS, F. J., "BOUNDARY LAYER IN ADVERSE PRESSURE GRADIENT". 2. REVISION DATE: NOVEMBER 18, 1980 3. EVALUATORS: RUBESIN, M. W. AND HORSTMAN, C. C., NASA AMES RESEARCH CENTER, MOFFETT FIELD CA 94035 4. EXPERIMENT LOCATION AND DATE: NATIONAL RESEARCH COUNCIL, OTTAWA, CANADA 1975 5. ABSTRACT OF EXPERIMENT: AN EXPERIMENT WAS CONDUCTED IN A TWO-DIMENSIONAL CHANNEL WITH A COMPRESSION WEDGE USED TO CREATE AN ADVERSE PRESSURE GRADIENT ON THE FLAT TEST WALL. THE STUDY WAS PERFORMED AT A FREE-STREAM MACH NUMBER OF 4 IN THE NAE 5 INCH X 5 INCH BLOWDOWN WIND TUNNEL. THE REYNOLDS NUMBER BASED ON THE UNDISTURBED MOMENTUM BOUNDARY LAYER THICKNESS WAS 3.5 X 10**4. 6. REFERENCES: 1. ZWARTS, F. J. "THE COMPRESSIBLE TURBULENT BOUNDARY LAYER IN A PRESSURE GRADIENT", PH.D. THESIS, MCGILL UNIVERSITY, MONTREAL, 1970. 2. FERNHOLZ, H. H. , FINLEY, P. J. " A CRITICAL COMPILATION OF COMPRESSIBLE TURBULENT BOUNDARY LAYER DATA", AGARDOGRAPH 223, 1977 (FLOW 7007). 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 STATIC PRESSURE AND TOTAL TEMPERATURES CONSTANT THROUGH THE BOUNDARY LAYER. 8. GLOBAL PARAMETERS INFINITY CONDITIONS ARE DEFINED AT X = -0.00635 M. XMINF = 4.0203 PINF = 9.4452E 03 N/M**2 UINF = 672.31 M/S TEMPERATURES AT X = -0.00635 M ARE TTOT = 21.84 DEGREES CENTIGRADE. (295 KELVIN) TWALL = 1.84 DEGREES CENTIGRADE. (275 KELVIN) TSTAT = -203.594 DEGREES CENTIGRADE. (69.566 KELVIN) BOUNDARY LAYER QUANTITIES AT X = -0.00635 M. ARE DEL = 0.01088 M. DELS = 0.00447 M. THETA = 0.00056 M. 9. MEASURED VARIABLES EACH MEASURING STATION INCLUDES DATA FOR THE FOLLOWING MEASURED OR INFERRED QUANTITIES: X STREAMWISE DISTANCE. M (MEASURED FROM AN ARBITRARY POINT IN THE WIND TUNNEL) XM MACH NUMBER EXTERNAL TO BOUNDARY LAYER THETA MOMENTUM THICKNESS. M CF SKIN FRICTION COEFFICIENT BASED ON BOUNDARY LAYER EDGE CONDITIONS H NONDIMENSIONAL SHAPE FACTOR (DELS/THETA) PSTAT STATIC PRESSURE. N/M**2 UE VELOCITY EXTERNAL TO THE BOUNDARY LAYER. M/S Y TRANSVERSE DISTANCE MEASURED FROM TEST SURFACE. M U MEAN VELOCITY. M/S U/UE NONDIMENSIONAL VELOCITY. 10. MEASUREMENT UNCERTAINTY UNCERTAINTIES ESTIMATED FROM BASIC MEASUREMENT UNCERTAINTY PSTAT: + OR - 0.02* PSTAT CF: + OR - 0.10* CF U: + OR - 0.03* U H: + OR - 0.05* H 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; 100 RECORDS PER BLOCK; BLOCKSIZE = 8000 BYTES. NORMALIZED DATA ARE CREATED FROM MEASURED DATA AS FOLLOWS: XNORM=(X-XMIN)/(XMAX-XMIN) THUS EACH NORMALIZED DATUM IS WRITTEN ONTO TAPE AS A VALUE BETWEEN 0.0 AND 1.0 ALL NULL DATA ARE WRITTEN AS 2.0 THE EQUATION DESCRIBING THE RELATIONSHIP BETWEEN ACTUAL DATA AND NORMALIZED DATA IS: X=XMIN + ((XMAX-XMIN) * XNORM) WHERE X, XMAX, XMIN AND XNORM ARE REAL NUMBERS. FILE # NREC CONTENTS FORMAT COMMENTS 1 TEXT FILE CONTAINS ITEMS 1 TO 11 OF THIS WRITE-UP 2 44 X,XM,THETA,CF 4E13.6 RECORD 1:MAX VALUES H,PSTAT,UE 3E13.6 RECORD 2:MAX VALUES X,XM,THETA,CF 4E13.6 RECORD 3:MIN VALUES H,PSTAT,UE 3E13.6 RECORD 4:MIN VALUES X,XM,THETA,CF 4E13.6 ODD RECORDS 5-43 NORMALIZED VALUES H,PSTAT,UE 3E13.6 EVEN RECORDS 6-44 NORMALIZED VALUES FILES 3-8 CONTAIN MEAN-VELOCITY PROFILE DATA AT SIX STREAMWISE MEASURING STATIONS. 3 24 Y,U/UE 2E13.6 STATION: X=0.01905 M RECORD 1- MAX VALUES Y,U/UE 2E13.6 RECORD 2- MIN VALUES Y,U/UE 2E13.6 RECORDS 3-24 NORMALIZED VALUES 4 25 Y,U/UE 2E13.6 STATION: X=0.04445 M RECORD 1- MAX VALUES Y,U/UE 2E13.6 RECORD 2- MIN VALUES Y,U/UE 2E13.6 RECORDS 3-25 NORMALIZED VALUES 5 26 Y,U/UE 2E13.6 STATION: X=0.09525 M RECORD 1- MAX VALUES Y,U/UE 2E13.6 RECORD 2- MIN VALUES Y,U/UE 2E13.6 RECORDS 3-26 NORMALIZED VALUES 6 24 Y,U/UE 2E13.6 STATION: X=0.15875 M RECORD 1- MAX VALUES Y,U/UE 2E13.6 RECORD 2- MIN VALUES Y,U/UE 2E13.6 RECORDS 3-24 NORMALIZED VALUES 7 26 Y,U/UE 2E13.6 STATION: X=0.19685 M RECORD 1- MAX VALUES Y,U/UE 2E13.6 RECORD 2- MIN VALUES Y,U/UE 2E13.6 RECORDS 3-26 NORMALIZED VALUES 8 28 Y,U/UE 2E13.6 STATION: X=0.24765 M RECORD 1- MAX VALUES Y,U/UE 2E13.6 RECORD 2- MIN VALUES Y,U/UE 2E13.6 RECORDS 3-28 NORMALIZED VALUES A SAMPLE PROGRAM FOR READING FILE 8 AND PRINTING IT IS SHOWN BELOW. THE JCL IS FOR THE STANFORD CIT FACILITY. CHECK WITH YOUR OWN COMPUTER FACILITY FOR THE EXACT JCL NEEDED. //TAPE JOB BRC$NJ /*SETUP TAPE=1,INPUT=(LIBRARY NUMBER ASSIGNED TO TAPE) // EXEC FORTCG //FORT.SYSIN DD * C TO READ FILE 8 OFF TAPE AND C PRINT THE MAXIMAS AND MINIMAS OF ALL THE VARIABLES AND PRINT C THE NORMALIZED VALUES OF ALL THE VARIABLES DIMENSION Y(30),UUE(30) READ (23,30) YMX,UUEMX READ (23,30) YMN,UUEMN WRITE (6,40) YMX,UUEMX WRITE (6,40) YMN,UUEMN C THE NEXT 26 RECORDS CONTAIN THE NORMALIZED PROFILE DATA DO 10 I=1,26 READ (23,30) Y(I),UUE(I) WRITE (6,40) Y(I),UUE(I) 10 CONTINUE 30 FORMAT (2E13.6) 40 FORMAT (1X,2E13.6) STOP END //GO.FT23F001 DD UNIT=T1600,VOL=SER=(TAPE LIBRARY), // DISP=(OLD,KEEP),DCP=(RECFM=FB,LREC=80,BLKSIZE=8000,DEN=3), // LABEL=(8,NL) // -------------- END OF FILE NUMBER 902------------- ----------------- FILE NUMBER 903----------------- 0.247650E 00 0.402060E 01 0.672670E-03 0.113800E-02 0.784890E 01 0.427180E 05 0.672320E 03 -0.635000E-02 0.295780E 01 0.561660E-03 0.726000E-03 0.490610E 01 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