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Blade and flowpatb geometries, as well as a complete set of laser anemometer measurements acquired at the design and off-design conditions, are available as formatted ASCII files. The blade and flowpath geometry files reflect the data shown in tables I and II. The contents of the laser anemometer data files are described in the following section. Master Grid File Describing Laser Survey Points The Master Grid File contains the coordinates of the body- fitted measurement grid which was used to define the laser an- emometer survey points. The Master Grid File was also used to define the throughflow and secondary velocity components presented in this document and in prior publications (Hathaway et al. (1993) and Chriss, Hathaway, and Wood (1994)). The Master Grid File, file name mgf.dat, is available on disk as an ASCII formatted file that contains the following information: read(unit,30) (((z(i,j,k),i= 1,ni),j= 1,nj),k= 1,nk) 30 format(8fl 0.4) C stop end Laser Anemometer Data The laser anemometer measurements are stored as formatted ASCII files of the passage-averaged results at a pitchwise reso- lution of 200 points. The files are named according to the streamwise J-index of the body-fitted measurement grid that was used to position the laser anemometer within the impeller. The measurement grid used in this investigation divided the streamwise blade length into a series of quasi-orthogonal or near-normal, cross-channel planes. Therefore, each J-index, and thus each file, corresponds to a particular quasi-orthogonal measurement plane within the impeller. The data in each file are organized in order of increasing percent-of-span from the hub. For each span, the percent-of-span and the r,z location of the measurement point are provided, followed by the measured radial, relative tangential, and axial velocities for each of the 200 pitchwise measurement points across an average rotor pas- sage (expressed in SI units throughout). For relative tangential velocities, positive is in the direction of rotor rotation. Each file consists of the following: -A file header block 20 lines long -The file creation date and time, datime -The J-index of the current quasi-orthogonal measurement station and the blade leading and trailing edges, j, fie, fie -The number of spanwise survey locations for the current quasi-orthogonal survey plane, nk -The number of pitchwise measurement windows per blade passage, ni -The operating condition, massflow and speed for the cur- rent data set, wc, rpm -For each spanwise survey, k, at the current quasi- orthogonal measurement station (a) rn 1,rn2 are laser anemometer run numbers. (b) ps, r,z are nominal percent span, radius, and axial position of survey data at current spanwise location. (c) wn, vr, vt, vz are a tabulation of window number and radial, relative tangential, and axial velocities for each pitchwise window number. Window number I lies on the suction surface and window 200 is one window away from the suction surface of the ad- jacent passage. The window number increases in the direc- tion opposite of rotor rotation. itip, ile, ite ni, nj, nk nb rpm r(ni, nj,nk) t(ni, nj, nk ) z(ni, nj, nk) indicies of the tip, leading, and trailing edge grid points number of grid points in the pitchwise, stream- wise, and spanwise directions number of impeller blades tested rotational speed of the impeller array of r-coordinates array of O-coordinates array of z-coordinates of each grid point of each grid point of each grid point In order to keep the size of the Master Grid File manageable, only the coordinates of the blade surfaces and mean camber- line are provided. The 200 pitchwise points resolved from the laser anemometer measurements can be generated from the blade geometry information. The pitchwise indices of the Master Grid File are arranged across the blade passage, from suction, to mean camberline, to pressure surface. Points up- stream and downstream of the blade leading and trailing edges are extensions of the blade mean camberline. The following FORTRAN program can be used to read the Master Grid File: C I0 20 10) 10) 10) itip,ile,ite ni,nj,nk nb rpm (((r(i,j,k),i= l,ni),j= l,nj),k= 1,nk) (((t(i,j,k),i= 1,ni),j= l,nj),k= 1,nk) 12 real*4 r(3,221, !06),t(3,221,106),z(3,221,106),rpm integer*2 read(unit, read(unit, read(unit, format(3i8) read(unit,20) format(f 13.2) read(unit,30) read(unit,30) itip,ile,ite,ni,nj,nk,nb Appendix A Description of Data on Magnetic MediumPDF Image | Laser anemometer measurements of the three-dimensional rotor flow
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