Authors :
Pradeep Kumar Behera; P Vasantha Kumar
Volume/Issue :
Volume 5 - 2020, Issue 6 - June
Google Scholar :
http://bitly.ws/9nMw
Scribd :
https://bit.ly/3iyBR0Q
Abstract :
This paper studies the performance
characteristics of a Low Pressure Turbine Cascade with
and without introducing tubercles. The focus of the
project is on improvement in the performance of the
turbine cascade. Improving the turbine performance in
turn improves the efficiency of the engine. In the
present work, tubercles are introduced onto the leading
edge of a low pressure turbine cascade so as to enhance
its performance in terms of its lift and surface pressure
distribution CFD analysis has been carried out on the
blades of a low pressure turbine cascade with and
without tubercles at zero incidence. Both the results are
compared and conclusions are drawn as to which blade
has better performance. Blade profile used in both the
simulations is T106 turbine blade at a Reynolds number
of 1.6x105
. From the simulations method not fully
turbulence model with transition model has been used
& observed that the pressure difference between the
suction and pressure surfaces increases for the blade
with tubercles. For the T106 blade without tubercles,
separation starts at nearly 76% of chord whereas for
the blade with tubercles separation starts at nearly 82%
of chord. The present computational investigation
shows that flow separation on the LPT cascade is
delayed by the use of leading edge tubercles for an
extent of 6% of the chord.
Keywords :
Low Pressure Turbine Cascade, Tubercles, Low Reynolds number, Transition model.
This paper studies the performance
characteristics of a Low Pressure Turbine Cascade with
and without introducing tubercles. The focus of the
project is on improvement in the performance of the
turbine cascade. Improving the turbine performance in
turn improves the efficiency of the engine. In the
present work, tubercles are introduced onto the leading
edge of a low pressure turbine cascade so as to enhance
its performance in terms of its lift and surface pressure
distribution CFD analysis has been carried out on the
blades of a low pressure turbine cascade with and
without tubercles at zero incidence. Both the results are
compared and conclusions are drawn as to which blade
has better performance. Blade profile used in both the
simulations is T106 turbine blade at a Reynolds number
of 1.6x105
. From the simulations method not fully
turbulence model with transition model has been used
& observed that the pressure difference between the
suction and pressure surfaces increases for the blade
with tubercles. For the T106 blade without tubercles,
separation starts at nearly 76% of chord whereas for
the blade with tubercles separation starts at nearly 82%
of chord. The present computational investigation
shows that flow separation on the LPT cascade is
delayed by the use of leading edge tubercles for an
extent of 6% of the chord.
Keywords :
Low Pressure Turbine Cascade, Tubercles, Low Reynolds number, Transition model.
