TURBULENT JUNCTION VORTEX FLOW The data set presented here is for the mean flow structure around and within a turbulent junction vortex. The flow field is generated by a streamlined cylinder set normal to a flat plate. A brief description of the flow is given below. For more details on the geometry, flow conditions, coordinates, velocity components, pressure coefficients, instrumentation, calibration methods, data acquisition methods, data processing methods and uncertainty analysis, see references [1, 2, 4] for the pressure probe data, and reference [5] for the LDV data. References [1] and [2] are available from NTIS, reference [5] is available from University Microfilms, and reference [4] ia available from both NTIS and from University Microfilms. Different portions of the work have been presented in several journal and conference papers, and these are also listed in the references. Reference [3] includes some hot wire data for the flow, but this hot wire data is not included in this file and is only available in the report, available from NTIS. The pressure probe data files following are contained in references [1], [2] and [3]. The LDV data are contained in reference [5]. Reference [4] contains the most detailed description of the pressure probe work, but does not contain all the pressure probe data. The junction vortex flow is generated by a streamlined circular cylinder placed normal to a flat plate. The cylinder has a circular leading edge shape with 127 mm diameter and has a straight taper to a sharp trailing edge for a length or chord of 298 mm. The cylinder is 229 mm high and is placed in a 2DTBL approximately 80 mm thick. The Reynolds number based on cylinder thickness (diameter) is 170,180 and the upstream boundary layer momentum Reynolds number is 10,840. All data were taken at a fixed tunnel unit Reynolds number to maintain dynamic similarity. The data set boxes a region of flow which extends from 203 mm upstream of the leading edge of the body to the trailing edge of the body. The width of the region is 203 mm and the height is 140.8 mm. Five-hole probe data on all faces of this boxed region plus two additional planes are reported. Surface pressure data on the flat floor and the side of the body are also reported. In addition, very detailed LDV data highlighting the junction vortex in the upstream plane of symmetry are reported. The uncertainities associated with the data are given in all cases, except a few exceptions. The uncertainities are given immediately after the data, and are separated from the data by a plus (+) sign. These should be read as plus or minus but the plus/minus symbol is not available. All velocity data are normalised by the velocity at the throat of the tunnel. The coordinate system used has the origin on the leading edge of the body. The positive x direction is in the downstream direction and the positive y direction is going up from the floor. The positive z direction is the direction consistent with a right handed coordinate system. The data set consists of eighteen separate files. The first ten files are identical in content to the script files used to generate the tables in reference [1] and document the flow upstream and around the junction vortex. The next seven files are identical in content to the script files used to generate the tables in reference [2] and document the near wake flow. The last file contains the LDV plane of symmetry data contained in reference [5]. These script files have been edited for more convenient use as a computer data base. 1. CPBODY (Table A1 ref [1]) Contains surface pressure coefficient data on the side of the body. The data format is x y CP (mm) (mm) 2. CPFLOOR1 (Table A2 ref [3]) Contains early surface pressure coefficient data on the flat floor from ref [2] and originally in ref [3]. The format is x z CP (mm) (mm) 3. CPFLOOR2 (Table A3 ref [1]) Contains surface pressure coefficient data on the flat floor. The format is same as CPFLOOR1. 4. UPSTREAM (Table B1, ref [1]) Contains five-hole probe data for the upstream plane. This plane is defined by x = -203 mm y = 0 mm to 140.8 mm z = 0 mm to -203 mm The data is given in 25 sets, each set for a particular (x,z) location. The data format for each set is Line 1 : x (mm) z (mm) Lines 2-37: y Beta Alpha CPT CPS Speed U V W mm deg deg 5. FARSIDE (Table B2 ref[1]) Contains five-hole probe data for the remote side plane. It is defined by x = -203 mm to 305 mm y = 0 mm to 140.8 mm z = -203 mm The data is given in 39 sets, each set for a particular (x,z) location. The data format is the same as UPSTREAM. 6. TOP (Table B3 ref [1]) Contains data for the top surface. This plane is defined by x = -203 mm to 305 mm y = 140.8 mm z = 0 mm to -203 mm Contains four sets of data. The data format for set 1 is Line 1 : y (mm) z (mm) Lines 2-26: x Beta Alpha CPT CPS Speed U V W mm deg deg The data format for sets 2-4 is Line 1 : y (mm) z (mm) Lines 2-42: x Beta Alpha CPT CPS Speed U V W mm deg deg 7. SYMMETRY (Table B4 ref [1]) Contains five-hole probe data for the upstream symmetry plane. This plane is defined by x = -203 mm to 0 mm y = 0 mm to 140.8 mm z = 0 mm The data is in 16 sets. Format for sets 1-12 is Line 1 : x (mm) z (mm) Lines 2-37: y Alpha CPT CPS Speed U V mm deg The format for sets 13-14 is Line 1 : x (mm) z (mm) Lines 2-36: y Alpha CPT CPS Speed U V mm deg The format for set 15 is Line 1 : x (mm) z (mm) Lines 2-35: y Alpha CPT CPS Speed U V mm deg The format for set 16 is Line 1 : x (mm) z (mm) Lines 2-32: y Alpha CPT CPS Speed U V mm deg 8. CHORD43 (Table B5 ref [1]) Contains five-hole probe data for the 43% chord plane. This plane is defined by x = 127 mm y = 0 mm to 140.8 mm z = 0 mm to -203 mm The data is given in 14 sets, each set for a particular (x,z) location. The data format for each set is Line 1 : x (mm) z (mm) Lines 2-37: y Beta Alpha CPT CPS Speed U V W mm deg deg 9. CHORD100 (Table B6 ref [1]) Contains five-hole probe data for the 100% chord plane. This plane is defined by x = 305 mm y = 0 mm to 140.8 mm z = 0 mm to -203 mm The data is given in 22 sets, each set for a particular (x,z) location. The data format for each set is Line 1 : x (mm) z (mm) Lines 2-37: y Beta Alpha CPT CPS Speed U V W mm deg deg 10. NEARSIDE (Table B7 ref [1]) Contains five-hole probe data for the near side plane. This plane is defined by x = -203 mm to 305 mm y = 0 mm to 140.8 mm z = -114 mm The data is given in 12 sets, each set for a particular (x,z) location. The data format for each set is Line 1 : x (mm) z (mm) Lines 2-37: y Beta Alpha CPT CPS Speed U V W mm deg deg 11. CPFLOORD (Table A ref [2]) Contains surface pressure coefficient data on the flat floor from ref [2]. The format is x z CP (mm) (mm) 12. SYMMTRYD (Table B1 ref [2]) Contains five-hole probe data for the downstream symmetry plane. This plane is defined by x = 305 mm to 610 mm y = 0 mm to 140.8 mm z = 0 mm The data is given in 31 sets, each for a particular (x, z=0) location. The data format for each set is Card 1 : x (mm) z (mm) Cards 2-37: y Alpha CPT CPS Speed U V mm deg 13. FARSIDED (Table B2 ref [2]) Contains five-hole probe data for the downstream remote side or streamwise plane. This plane is defined by x = 318 mm to 610 mm y = 0 mm to 140.8 mm z = -203 mm The data is given in 24 sets, each set for a particular (x,z) location. The data format for each set is Card 1 : x(mm) z(mm) Cards 2-37: y Beta Alpha CPT CPS Speed U V W mm deg deg 14. NEARSDED (Table B3 ref [2]) Contains five-hole probe data for the downstream near side or streamwise plane. This plane is defined by x = 343 mm to 559 mm y = 0 mm to 140.8 mm z = -114 mm The data is given in 5 sets, each set for a particular (x,z) location. The data format for each set is the same as set #14. 15. CHORD150 (Table B4 ref [2]) Contains five-hole probe data for the 150% chord plane. This set contains more data than in the corresponding Table B4 in ref [2]. This plane is defined by x = 457 mm y = 0 mm to 140.8 mm z = 0 mm to -203 mm The data is in 23 sets, each for a particular (x,z) location. The data format for each set is the same as set #14. 16. CHORD200 (Table B5 ref [2]) Contains five-hole probe data for the 200% chord plane. This set contains more data than in the corresponding Table B5 in ref [2]. This plane is defined by x = 610 mm y = 0 mm to 140.8 mm z = 0 mm to -203 mm The data is in 23 sets, each for a particular (x,z) location. The data format for each set is the same as set #14. 17. TOPD (Table B6 ref[2]) Contains five-hole probe data for the top surface. This plane is defined by x = 305 mm to 610 mm y = 0 mm to 140.8 mm z = -38 mm to -152 mm The data is in 4 sets, each for a particular (y,z) location. The data format for each set is Card 1 : y (mm) z (mm) Cards 2-26: x Beta Alpha CPT CPS Speed U V W mm deg deg 18. LDV2D (ref [5]) Contains the LDV data for the upstream symmetry plane. The data is for the region given by x/D = -1 to -0.0126 y/D = 0.018 to 0.310 z = 0 mm where D = Diameter of the body = 127 mm The data is in 44 sets. Format for sets 1-6 is Line 1 : x/D z/D Lines 2-21: y/D U V The format for sets 7-44 is Line 1 : x/D z/D Lines 2-45: y/D U V References : 1. Pierce, F. J., et al., "The Mean Flow Structure of a Turbulent Junction Vortex", Rept. VPI-E-87-6, April 1987 (available NTIS). 2. Pierce, F. J., et al., "The Mean Flow Structure in the Near Wake of a Turbulent Junction Vortex", Rept. VPI-E-87-26, December 1987 (available NTIS). 3. Pierce, F. J., et al., "The Mean Flow Structure Around and Within a Turbulent Junction Vortex", Rept. VPI-E-85-19, September 1985 (available NTIS). 4. Harsh, M. D., "An Experimental Investigation of a Turbulent Junction Vortex", PhD Dissertation, Mechanical Engineering, Virginia Polytechnic Institute and State University, January 1985 (available University Microfilms). Also available as Harsh, M. D., and F. J. Pierce, "An Experimental Investigation of a Turbulent Junction Vortex", Rept. VPI-E-85-4, February 1985 (available NTIS). 5. Tree, I. K., "Laser Doppler Velocimeter Measurements in a Turbulent Junction Vortex", PhD Dissertation, Mechanical Engineering, Virginia Polytechnic Institute and State University June 1886 (available University Microfilms). 6. Pierce, F. J., and J. Shin, "The Development of a Turbulent Junction Vortex System", JFE, Trans ASME, 114, Dec 1992. 7. Pierce, F. J., "The Turbulent Junction Vortex as a Standard Test Case for Three-Dimensional Solvers", AIAA J, 29, Jan 1991 8. Pierce, F. J., and S. Nath, "Inteference Drag of a Turbulent Junction Vortex", JFE, Trans ASME, 112, Dec 1990. 9. Pierce, F. J., and I. K. Tree, "The Mean Flow Structure on the Symmetry Plane of a Turbulent Junction Vortex", JFE, Trans ASME, 112, Mar 1990. 10. Menna, J.D., and F. J. Pierce, "The Mean Flow Structure Around and Within a Turbulent Junction or Horseshoe Vortex: Part I: The Upstream and Surrounding Three-Dimensional Boundary Layer, JFE, Trans ASME, 110, Dec 1988. 11. Pierce, F. J.,and M. D. Harsh, "The Mean Flow Structure Around and Within a Turbulent Junction or Horseshoe Vortex: Part II: The Separated and Junction Vortex Flow", JFE, Trans ASME, 110, Dec 1988.