Design & Aerodynamics of Inlets & Nozzles P M V Subbarao Professor Mechanical Engineering Department Understanding of Real Flow Through Passive Devices…….

Slides:

Advertisements

Similar presentations

Example 3.4 A converging-diverging nozzle (Fig. 3.7a) has a throat area of m2 and an exit area m2 . Air stagnation conditions are Compute.

Advertisements

Gas Turbine Cycles for Aircraft Propulsion

Thermodynamics & Gas dynamics of Real Combustion in Turbo Combustor P M V Subbarao Professor Mechanical Engineering Department Tools for precise estimation.

Lecture #12 Ehsan Roohi Sharif University of Technology Aerospace Engineering Department 1.

Operating Characteristics of Nozzles P M V Subbarao Professor Mechanical Engineering Department I I T Delhi From Takeoff to cruising …… Realizing New.

Chap 5 Quasi-One- Dimensional Flow. 5.1 Introduction Good approximation for practicing gas dynamicists eq. nozzle flow 、 flow through wind tunnel & rocket.

Example 3.1 Air flows from a reservoir where P = 300 kPa and T = 500 K through a throat to section 1 in Fig. 3.4, where there is a normal – shock wave.

Analysis of Oblique Shocks P M V Subbarao Associate Professor Mechanical Engineering Department I I T Delhi A Mild, Efficient and Compact Compressor ….

Lecture 5 Shaft power cycles Aircraft engine performance

Discovery of A Strong Discontinuity P M V Subbarao Associate Professor Mechanical Engineering Department I I T Delhi A Break Through Finding To Operate.

Assessment of Engine Breathing Capacity P M V Subbarao Professor Mechanical Engineering Department Measure of Filling & Emptying Effectiveness….

The Thrust Generator P M V Subbarao Professor Mechanical Engineering Department Another Passive Device…… An Obvious Concept for Generation of Motive Power.

C & CD Nozzles for Jet Propulsion

Chapter IV Compressible Duct Flow with Friction

Analysis of Turbofan Engine

MAE 4261: AIR-BREATHING ENGINES Exam 2 Review Exam 2: November 18 th, 2008 Mechanical and Aerospace Engineering Department Florida Institute of Technology.

Stagnation Properties P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Capacity of A Resource…..

Analysis of A Disturbance in A Gas Flow P M V Subbarao Associate Professor Mechanical Engineering Department I I T Delhi Search for More Physics through.

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

Design Steps for Intake & Exhaust Systems

Quasi - One Dimensional Flow with Heat Addition P M V Subbarao Professor Mechanical Engineering Department I I T Delhi A Gas Dynamic Model for Combustion.

Parametric Cycle Analysis of Ideal Turbo Jet Engine

Review of Components Analysis Aerospace Engineering, International School of Engineering (ISE) Academic year : (August – December, 2012) Jeerasak.

Supersonic Inlets - Oblique Shocks -1 School of Aerospace Engineering Copyright © 2001 by Jerry M. Seitzman. All rights reserved. AE3450 Supersonic (Engine)

One Dimensional Flow of Blissful Fluid -III P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Always Start with simplest Inventions……..

One Dimensional Flow with Heat Addition

Gas Dynamics of Variable Area Ducts P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Development of Efficient and Compact Passive.

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

Design of Supersonic Intake / Nozzle P M V Subbarao Associate Professor Mechanical Engineering Department I I T Delhi Meeting the Cruising Conditions…

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.

UNIT-1 FUNDAMENTALS OF GAS TURBINE ENGINES. INTRODUCTION Comprehend the thermodynamic processes occurring in a gas turbine Comprehend the basic components.

First step in Understanding the Nature of Fluid Flow…. P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Analysis of Simplest Flow.

MAE 4261: AIR-BREATHING ENGINES

© Fox, Pritchard, & McDonald Introduction to Fluid Mechanics Chapter 13 Compressible Flow.

Reflection of Oblique Shocks P M V Subbarao Professor Mechanical Engineering Department I I T Delhi A Train of Waves ….. Where to End ???

Chapter 12 Compressible Flow

Gas Dynamics of Flow through Valves Method to Estimate the Flow Capacity of Valve Passage…. P M V Subbarao Professor Mechanical Engineering Department.

Momentum Equation and its Applications

Chapter 7. Application of Thermodynamics to Flow Processes

Shock waves and expansion waves Rayleigh flow Fanno flow Assignment

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

Compressive Flow in Nozzles

Design and analysis of Parabolic nozzle using MOC and CFD

Stagnation Properties

One Dimensional Flow of Blissful Fluid -III

Performance Characteristics of Turbo Jet Engines

MEL 341 : GAS DYNAMICS & PROPULSION

MAE 5380: AIR-BREATHING ENGINE INLETS

Oblique Shocks : Less Irreversible Thermodynamic Devices

Measure of Filling & Emptying Effectiveness….

Design and analysis of a Scramjet combustion Chamber

BY Dr. P M V Subbarao Mechanical Engineering Department I I T Delhi

Gas Dynamics for Design of Nozzles

Design of Passive (Adiabatic) Control Volumes

Gas Dynamics for Study of Critically Off-Design Conditions

Gas Dynamics for Design of Intakes

Gas Dynamics for Study of Off-Design

Design Space for Combustor

Matching of Propulsion Systems for an Aircraft

Subject Name: AIRCRAFT PROPULSION Subject Code: 10AE55

MAE 5360: Hypersonic Airbreathing Engines

Design of An Axial Compressor Stage for Jet Engines

Estimation of Profile Losses

Thermodynamic Analysis of Ramjet Engines

For this type of flow, the stagnation temperature is constant, then

Axisymetric Inlet Design for Combined-Cycle Engines Jesse R

Irreversibilities in Propulsion Systems

P M V Subbarao Professor Mechanical Engineering Department

Analysis & Selection of Design Space for Turbofan

Introduction to Fluid Mechanics

Presentation transcript:

Design & Aerodynamics of Inlets & Nozzles P M V Subbarao Professor Mechanical Engineering Department Understanding of Real Flow Through Passive Devices…….

Frictional Flow through A Variable CS Area Mass flow rate through any cross section of area A

Design Steps for Inlet Supersonic flights: Decide and optimize number of oblique shocks and final downstream conditions of normal shock. Compute all properties at the just upstream of inlet. Subsonic flight: Outer cone affected Ambient air properties and flight Mach number are upstream conditions for inlet. Define upstream inlet conditions as: p i,T i,V i …… Cycle calculations demand a mass flow rate.

Step by Step Design of Intakes or Nozzles Select appropriate value of dx. Assume that all properties remain unchanged over the length dx and same as inlet condition. Therefore,

Total Pressure Recovery Pressure Recovery after dx: Continue till the exit of the intake.

Exit Conditions for Inlets Limiting the exit dimensions. Limiting the exit Mach Number. Limiting the length of the inlet.

Extra Input Data !!!! Variation of diameter of Intake.(dD h /dx) Variation of Area of Intake (dA/dx). Variation of Mach Number (dM/dx) Final Design is A compromise between size and performance.

An Ideal Intake Duct Geometry

Real Subsonic Intakes

Aerodynamic Performance of Subsonic Intakes Subsonic intakes exhibit four different flow regimes or stall characteristics. Non dimensional axial length (length/inlet area) and the total divergence angle of the diffuser are chosen as the primary variables to identify the flow regimes. Fully attached exit flow with steady internal flow Fully attached exit flow with internal unsteady flow Fully developed stall flow Jet Flow Pressure Recovery Factor

Flow Regimes in Subsonic Intake

Characteristics of Flow Regimens in Subsonic Intake Axial Length/Entrance Area

Pressure Recovery Factor for Planar Intakes Area Ratio

Pressure Recovery Factor for Conical Intakes Area Ratio

Pressure Recovery Factor for Annular Intakes Area Ratio

Typical External flow at Subsonice Cruising Conditions

External Flow Patterns

External Stream Tube

Factors Limiting the Intake Performance