Lecture PPTs (21) - Lect 22 1 Lect-22 In this lecture Axial...

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1 Lect- 22
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Prof. Bhaskar Roy, Prof. A M Pradeep, Department of Aerospace, IIT Bombay 2 Lect-22 In this lecture... Axial flow turbine Performance characteristics Axial turbine blades Exit flow matching with nozzle
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Prof. Bhaskar Roy, Prof. A M Pradeep, Department of Aerospace, IIT Bombay 3 Lect-22 Axial turbine performance We have seen that for an axial compressor, = = = 01 01 01 01 02 2 01 2 01 01 01 02 01 01 02 T N , P T m f , P P to reduces above the Therefore fixed. are R and D Also, tly. significan e performanc the affect not do and that assume can we design, given a For design , , D , RT D , D P RT m f , P P , parameters ess dimensionl - non of terms In D) design, , , R , , , T , P , m ( f , P C C C η ν γ γ ν Ω γ Ω γ η ν γ Ω η
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Prof. Bhaskar Roy, Prof. A M Pradeep, Department of Aerospace, IIT Bombay 4 Lect-22 Axial turbine performance . ly respective , turbine the of exit and inlet the denote and subscripts , Where T N , P T m f , P P number, Reynolds high ly sufficient a at fluid given a with operating turbine given a for Therefore, well. as turbine a for stics characteri e performanc define can we manner, similar a In C 02 01 01 01 01 01 02 = η
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Prof. Bhaskar Roy, Prof. A M Pradeep, Department of Aerospace, IIT Bombay 5 Lect-22 Axial turbine performance 01 02 P P 01 01 P T m 01 T / N Choking mass flow
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Prof. Bhaskar Roy, Prof. A M Pradeep, Department of Aerospace, IIT Bombay 6 Lect-22 Axial turbine performance 01 02 P / P 01 T / N t η 0.8 1.0 0.6 0.4 1.0 0.8 1.0 0.8 0.6 1.0 2.0 3.0 4.0 5.0
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