Turbine blade with improved swirl cooling performance at leading edge and engine

A turbine blade, comprising:

• a blade body;
• a division plate;
• a plurality of first protruding ridges;
• a plurality of second protruding ridges;
• a first jet hole group;
• and
• a second jet hole group;
• wherein the blade body comprises a suction-side wall surface and a pressure-side wall surface;
• the suction-side wall surface comprises a suction-side inner wall surface and a suction-side outer wall surface;
• the pressure-side wall surface comprises a pressure-side inner wall surface and a pressure-side outer wall surface;
• the division plate is provided at a leading edge of the blade body;
• the leading edge of the blade body has a cavity enclosed by the division plate, the suction-side wall surface, and the pressure-side wall surface;
• a stagnation region is formed by a junction between the suction-side wall surface and the pressure-side wall surface;
• and the stagnation region comprises a first stagnation sub-region at the leading edge of the blade body and a second stagnation sub-region at the leading edge of the cavity;
• the suction-side wall surface, the pressure-side wall surface, and the first stagnation sub-region are each provided with a plurality of first film cooling holes along a height direction of the blade body;
• the first jet hole group and the second jet hole group are provided on the division plate;
• the first jet hole group comprises a plurality of first jet holes distributed along the height direction of the blade body;
• and the second jet hole group comprises a plurality of second jet holes distributed along the height direction of the blade body;
• the plurality of first protruding ridges are provided on the suction-side inner wall surface along the height direction of the blade body;
• the plurality of second protruding ridges are provided on the pressure-side inner wall surface along the height direction of the blade body;
• and the plurality of first protruding ridges and the plurality of second protruding ridges are located on an inner wall surface of the cavity;
• the suction-side inner wall surface in the cavity is divided by the plurality of first protruding ridges into a first inner wall surface of the stagnation region and a rear portion of the suction-side inner wall surface;
• and the pressure-side inner wall surface in the cavity is divided by the plurality of second protruding ridges into a second inner wall surface of the stagnation region and a rear portion of the pressure-side inner wall surface;
• and
• the first inner wall surface of the stagnation region and the second inner wall surface of the stagnation region form an inner wall surface of the first stagnation sub-region.