FLAT-PLATE FILM COOLING WITH STEAM INJECTION THROUGH ONE ROW AND 2 ROWS OF INCLINED HOLES Academic Article uri icon

abstract

  • Experiments have been performed to investigate the film-cooling characteristics with steam injection through one row (7 tubes) and two rows (13 tubes) of holes, inclined at an angle of 35 deg, over a flat plate. The spacing between the holes as well as the distance between the rows is 2 1/2 hole diameters. Data have been obtained for both steam and air film-cooling effectiveness at different axial and lateral locations downstream of the injection holes. The blowing rate M varied from 0.2 to 1.5. In the case of one-row injection, the results show that the film-cooling effectiveness with steam injection is about 50 to 100 percent higher than that with air injection at downstream locations, depending upon the blowing rate; however, the increase in film-cooling effectiveness is reduced near the injection hole region at high blowing rates. In the case of two-row injection, the laterally averaged film cooling effectiveness can be correlated with the two-dimensional film-cooling parameter . The with steam injection is about 80 to 100 percent higher than that with air injection at low blowing rates and/or at downstream locations ( 15). However, the increase in with steam injection is reduced near the injection hole region and/or at high blowing rates ( 15).

published proceedings

  • JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME

author list (cited authors)

  • HAN, J. C., & MEHENDALE, A. B.

citation count

  • 26

complete list of authors

  • HAN, JC||MEHENDALE, AB

publication date

  • July 1986