380
11 Power Gas Turbines
With stator vanes, the same principles may be used as for rotor blades, but more
intense cooling is reached by using inserts, as shown on Fig. 11.7 (right), so that
impingement cooling is realised over a large fraction of the vane surface. Inserts
are often used with first row stator vanes (e.g. SGT6-5000F). Figure 11.8 shows the
cooling film holes in stator vanes.
Fig. 11.8 Film cooling holes
in stator vanes. (Courtesy
Siemens Energy)
Fig. 11.7 Rotor blade with convection cooling, impingement cooling and film cooling ( left; from
Fu et al. [6]; permission by ASME); stator vane with impingement cooling by inserts and film
cooling. ( right; courtesy Mitsubishi-Hitachi)
11 Power Gas Turbines
With stator vanes, the same principles may be used as for rotor blades, but more
intense cooling is reached by using inserts, as shown on Fig. 11.7 (right), so that
impingement cooling is realised over a large fraction of the vane surface. Inserts
are often used with first row stator vanes (e.g. SGT6-5000F). Figure 11.8 shows the
cooling film holes in stator vanes.
Fig. 11.8 Film cooling holes
in stator vanes. (Courtesy
Siemens Energy)
Fig. 11.7 Rotor blade with convection cooling, impingement cooling and film cooling ( left; from
Fu et al. [6]; permission by ASME); stator vane with impingement cooling by inserts and film
cooling. ( right; courtesy Mitsubishi-Hitachi)