Secondary Flows in Turbine Cascades & Consequences P M V Subbarao Professor Mechanical Engineering Department Finite Length of Blade Generates more Physical.

Slides:

Advertisements

Similar presentations

Modes of Work Transfer P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Development of Power for Different Needs!!!

Advertisements

Velocity Triangle for Turbo-machinery

Development of Compound Steam Turbines for Industrial Applications P M V Subbarao Professor Mechanical Engineering Department Fluid Dynamic Solutions.

Analysis of Obviously Boundary Layer… P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Flat Plate Boundary Layer Flows.

AXIAL FLOW COMPRESSORS

Aerofoil as A Turbine Blade

Wind Farm Noise Impact Assessment

Irreversibilities : Turbine to Condenser-II

Rothalpy P M V Subbarao Professor Mechanical Engineering Department Design variations through Conservation of Rothalpy….

The Ultimate Importance of Invariant Property : Rothalpy

A Mathematical Frame Work to Create Fluid Flow Devices…… P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Conservation Laws for.

Minimization of Profile Losses : Local Modifications of Blade Profile

Characterization of Losses in Turbine Cascades P M V Subbarao Professor Mechanical Engineering Department Convert the problems into Opportunities……

Development of Turbine Cascades

Classification of Flow Regimes : Blade Profile Losses

Yet Another Four Losses in Turbines - 1 P M V Subbarao Professor Mechanical Engineering Department A Set of Losses not Strictly due to Geometry of Blading….

Yet Another Four Losses in Turbines - 2 P M V Subbarao Professor Mechanical Engineering Department A Set of Losses not Strictly due to Geometry of Blading….

Boundary Layer Correction of Viscous Flow Through 2 D Turbine Cascades

Primary Elements of Engineering Thermodynamics P M V Subbarao Professor Mechanical Engineering Department I I T Delhi The First step to Develop Engineering.

Study of Multi Stage Steam Turbines

1 Short Summary of the Mechanics of Wind Turbine Korn Saran-Yasoontorn Department of Civil Engineering University of Texas at Austin 8/7/02.

The Curtis Turbine & The Parson Turbine P M V Subbarao Professor Mechanical Engineering Department Options for Economically Viable Speeds……

Vortical Analysis of Secondary Flows in Turbine Cascades P M V Subbarao Professor Mechanical Engineering Department A Pictorial Fluid Mechanics for Complex.

Enhancement of Heat Transfer P M V Subbarao Associate Professor Mechanical Engineering Department IIT Delhi Invention of Compact Heat Transfer Devices……

1 MAE 4261: AIR-BREATHING ENGINES Overview of Axial Compressors Mechanical and Aerospace Engineering Department Florida Institute of Technology D. R. Kirk.

Design Analysis of Parts of Francis Turbine

Unit 1: Fluid Dynamics An Introduction to Mechanical Engineering: Part Two Fluid dynamics Learning summary By the end of this chapter you should have learnt.

DESIGN OF CASCADE for AXIAL FLOW COMPRESSORS

Panel methods to Innovate a Turbine Blade-1 P M V Subbarao Professor Mechanical Engineering Department A Linear Mathematics for Invention of Blade Shape…..

Gas dynamics of Real Combustion in Turbo Combustor P M V Subbarao Professor Mechanical Engineering Department Make Sure that design is Acceptable to Gas.

An Exclusive Conservation Equation for Ideal Turbo-machines P M V Subbarao Professor Mechanical Engineering Department Invention of New Property for CVs.

Model to Schedule A Flow Path through A Turbo-machine P M V Subbarao Professor Mechanical Engineering Department Description of the Journey is More Important.

Selection of Stator-Rotor Combinations

The Stability of Laminar Flows

Performance Analysis of Multi Stage Axial Flow Compressors

Evolution of vorticity from the endwall boundary layer P M V Subbarao Professor Mechanical Engineering Department Methods to Estimate Enhanced Losses along.

Steps in Development of 2 D Turbine Cascades P M V Subbarao Professor Mechanical Engineering Department A Classical Method Recommended by Schlichting.……

Creation of A Better Energy Harvester !!!?!?!?! P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Harvesting of the Useful Energy.

A Design Philosophy through Accounting/Balancing/ Conservation …. P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Rothalpy Based.

Nature of Zero Pressure Gradient BL Flows…… P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Solutions for Flat Plate Boundary Layer.

Parametric Study of Turbine Cascades P M V Subbarao Professor Mechanical Engineering Department Identification of New design Variables.……

Leakage Flows in Turbine Cascades P M V Subbarao Professor Mechanical Engineering Department In a Large Group, a Fraction of Parcels Will Try to Look for.

More Discussions on Irreversible Flow Thorough Multi- stage Turbines P M V Subbarao Professor Mechanical Engineering Department Continuous Opportunities.

Development of Turbine Cascades P M V Subbarao Professor Mechanical Engineering Department Its Group Performance, What Matters.……

Date of download: 6/6/2016 Copyright © ASME. All rights reserved. From: Forward Blade Sweep Applied to Low-Speed Axial Fan Rotors of Controlled Vortex.

Date of download: 6/29/2016 Copyright © ASME. All rights reserved. From: Scaling Three-Dimensional Low-Pressure Turbine Blades for Low-Speed Testing J.

Theory of Turbine Cascades P M V Subbarao Professor Mechanical Engineering Department Its Group Performance, What Matters.……

Mathematics to Innovate Blade Profile P M V Subbarao Professor Mechanical Engineering Department Also a Fluid Device, Which abridged the Globe into Global.

P M V Subbarao Professor Mechanical Engineering Department

DYNAMIC STALL OCCURRENCE ON A HORIZONTAL AXIS WIND TURBINE BLADE

P M V Subbarao Professor Mechanical Engineering Department

Betz Theory for A Blade Element

Blade Design for Modern Wind Turbines

Multi Stage Impulse Reaction Turbines

P M V Subbarao Professor Mechanical Engineering Department

Secondary Flows in Turbine Cascades

Supplemental Learning Module

Design and Analysis of Wind Turbines using Dynamic Stall Effects

FLUID FLOW TYPICAL ENGINEERING PROBLEMS:

Analysis of Flow Beyond the Stage in A Multi Stage Turbine

Initial Designs of Turbines

Analysis of Boundary Layer flows

Leakage Flows in Turbine Cascades

Estimation of Profile Losses

Power Plant Steam Turbines

Irreversible Flow through A Turbine Stage

Supplemental Learning Module Atmospheric Boundary Layer Effects

Analysis & Control of Profile Losses

P M V Subbarao Professor Mechanical Engineering Department I I T Delhi

Turbines for Steam Power Plants

Presentation transcript:

Secondary Flows in Turbine Cascades & Consequences P M V Subbarao Professor Mechanical Engineering Department Finite Length of Blade Generates more Physical Boundaries and vorticity.……

Parts of A Current Turbine Rotor

Losses Contributed by EndWalls

More Geometrical Features of A Turbine Blade

Modular Concept of Blade Design & Construction

The Profile of A 3D Blade A 3D blade works along with its endwalls. Endwall flows originate from specifically developing endwall boundary layers. These are associated with the presence of longitudinal vortices with a dominant streamwise component of the vorticity. These are generally known as and secondary flows. They are driven by transverse static pressure gradients and mass forces acting on fluid elements in curvilinear motion through the blade-to-blade passage. Understanding the complex development of endwall flows is a part of betterment of blade profile !!!

Impact of Endwall Flows Endwall flows are also an important source of losses in turbines. More serious impact on cascades with short-height blading and high flow turning. Due to the complex nature of endwall boundary layer flows/secondary flows, the evaluation of endwall losses is not an easy task.