HORSE SHOE VORTEX A SIMPLE PRESENTATION.

Slides:

Advertisements

Similar presentations

Exploring the Four Forces of Flight

Advertisements

Aerodynamic Characteristics of Airfoils and wings

Lift Theories Linear Motion.

Pressure, Drag and Lift for Uniform Flow Over a Cylinder a 2 = 1.

Aerofoil as A Turbine Blade

Four Forces Acting on an Aircraft

Aero Engineering 315 Lesson 15 3-D (Finite) Wings Part I.

Airfoils, Lift and Bernoulli’s Principle

MAE 3241: AERODYNAMICS AND FLIGHT MECHANICS

Flow over immersed bodies. Boundary layer. Analysis of inviscid flow.

Classical Inflow Models. Background In Part II and Part III of our lecture notes, we used Glauert’s inflow model to compute the induced velocity in forward.

AE 1350 Lecture Notes #8. We have looked at.. Airfoil Nomenclature Lift and Drag forces Lift, Drag and Pressure Coefficients The Three Sources of Drag:

Theory of Flight 6.05 Lift and Drag References:

ME403 Chapter 3 Wing Aerodynamics

Basic Aerodynamic Theory and Drag

Utilizing your notes and past knowledge answer the following questions: 1) What is thrust and how can it be generated? 2) What occurs when the resultant.

Aerodynamic Forces Lift and Drag Aerospace Engineering

Computational Modelling of Unsteady Rotor Effects Duncan McNae – PhD candidate Professor J Michael R Graham.

KINEMATICAL STUDY OF THE FLOW AROUND SURFACE-MOUNTED OBSTACLES OBSTACLE IN A STEADY, UNIFORM WIND (a) Flow round a section of a tall rectangular building.

Utilizing your notes and past knowledge answer the following questions: 1) What are classroom items you like about the course Aviation Ground School? 2)

Drag Lecture 6 Chapter 3.

ENVIRONMENTAL WIND FLOWS AROUND BUILDINGS OUTLINING FLOW MECHANISMS – FLOW STRUCTURE AROUND ISOLATED BUILDING. Why architects need the knowledge about.

Pharos University ME 253 Fluid Mechanics II

Incompressible Flow over Airfoils

© 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their.

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

1 MAE 3241: AERODYNAMICS AND FLIGHT MECHANICS Finite Wings: General Lift Distribution Summary April 18, 2011 Mechanical and Aerospace Engineering Department.

Uncontrolled copy not subject to amendment Principles of Flight.

ABC Type of Flows…… P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Mathematical Models for Simple Fluid Flows.

ASCE Wind Loads SESSION 1-2 Wind Engineering Theory: Bluff Body Aerodynamics.

Chapter 11: Flow over bodies; Lift and Drag. Chapter 11: Flow over bodies; lift and drag ME33 : Fluid Flow 2 Objectives Have an intuitive understanding.

Contrails Contrails (short for "condensation trails") or vapour trails are artificial clouds that are the visible trails of condensed water vapour made.

Lecture Leading Cadet Training Principles of Flight 3 Drag.

Understand the principles of flight

VII. Analysis of Potential Flows. Contents 1. Preservation of Irrotationality 2. Description of 2D Potential Flows 3. Fundamental Solutions 4. Superposition.

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.……

External flow over immersed bodies If a body is immersed in a flow, we call it an external flow. Some important external flows include airplanes, motor.

Utilizing your notes and past knowledge answer the following questions: 1) The intensity or strength of the vortices is directly proportional to the ________.

Wake turbulence Cpl. Mario ŠAFÁRIK University of defence 22-3LP-ŘLP 04/04/2014.

Lecture 27: Lift Many biological devices (Biofoils) are used to create Lift. How do these work?

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.

CGS Ground School Principles Of Flight Drag © Crown Copyright 2012

The concept of the airfoil (wing section)

Warm-Up – 10/23 – 10 minutes Utilizing your notes and past knowledge answer the following questions: What is the point at which all weight is concentrated.

Streamlined body - flow follows contours of body : Bluff body

P M V Subbarao Professor Mechanical Engineering Department

Aerodynamic Forces Lift and Drag Aerospace Engineering

Blades for Wind Turbines

DRAG REDUCTION OF AIRPLANES - INDUCED DRAG

P M V Subbarao Professor Mechanical Engineering Department

Panel methods to Innovate a Turbine Blade

Betz Theory for A Blade Element

Primary Glider Challenge

P M V Subbarao Professor Mechanical Engineering Department

Four Forces Acting on an Aircraft

Theory of Flight 6.05 Lift and Drag References:

Design and Analysis of Wind Turbines using Dynamic Stall Effects

Invention of Geometries to Generate Lift

Aerodynamic Forces Lift and Drag Aerospace Engineering

Theory and its application

AN EXPERIMENTAL STUDY OF FLOW AROUND SURFACE-MOUNTED PYRAMIDS

Questions Laws and Forces, Lift and Drag, Loads and Load Factors

VORTICITY AND CIRCULATION WITHIN TWIN JETS ISSUING INTO A CROSSFLOW

Theory of Flight 6.05 Lift and Drag References:

Drag and Lift Elliott.

Presentation transcript:

HORSE SHOE VORTEX A SIMPLE PRESENTATION

WHAT IS HORSE SHOE VORTEX? The horseshoe vortex model is a simplified representation of the vortex system of a wing. In this model the wing vorticity is modelled by a bound vortex of constant circulation, travelling with the wing, and two trailing wingtip vortices, therefore having a shape vaguely reminiscent of a horseshoe

STARTING VORTEX A starting vortex is shed as the wing begins to move through the fluid, which dissipates under the action of viscosity, as do the trailing vortices far behind the aircraft

WING TIP VORTEX The trailing wingtip vortices are responsible for the component of the downwash which creates induced drag

HORSE SHOE VORTEX MODEL The horseshoe vortex model is unrealistic in that it implies uniform circulation (and hence, according to the Kutta–Joukowski theorem, uniform lift) at all sections on the wingspan.

HORSE SHOE VORTEX MODEL

HORSE SHOE VORTEX MODEL

HORSE SHOE VORTEX MODEL

HORSE SHOE VORTEX-REALISTIC MODEL In a more realistic model, the lifting-line theory, the vortex strength varies along the wingspan, and the loss in vortex strength is shed as a vortex sheet all along the trailing edge, rather than as a single trail at the wing-tips. Nevertheless, the simpler horseshoe vortex model used with a reduced effective wingspan but same mid-plane circulation provides an adequate model for the flows induced far from the aircraft

TERM-HORSE SHOE VORTEX The term horseshoe vortex is also used in wind engineering to describe the flow pattern created by strong winds around the base of a tall building. This effect is amplified by the presence of a low-rise building just upwind. This effect was studied at the UK Building Research Establishment between 1963 and 1973 and the cause of the effect is described in contemporary wind engineering text books

IN HYDRODYNAMICS In hydrodynamics, a form of horseshoe vortex forms around bluff bodies in the flowing water, for instance around bridge piers.They can cause scouring of bed materials from both upstream and downstream of the pier.

HORSE SHOE VORTEX-IN NATURE In nature, a horseshoe vortex can cause a horseshoe cloud to form.

IN NATURE

HS-VORTEX FLOW VISUALISATION

THANK YOU