Download presentation

Presentation is loading. Please wait.

Published byChloe Usilton Modified over 2 years ago

2
Thermodynamics & Gas dynamics of Real Combustion in Turbo Combustor P M V Subbarao Professor Mechanical Engineering Department Tools for precise estimation of fuel-air ratio….

3
Thermochemistry of Combustion

4
Modeling of Ideal Combustion

5
Modeling of Actual Combustion

7
Modeling of Combustion C X H Y S Z + 4.76 (X+Y/4+Z) AIR + Moisture in Air + Moisture in fuel → P CO 2 +Q H 2 O +R SO 2 + T N 2 + U O 2 + V CO Exhaust gases: P CO 2 +QH2O+R SO 2 + T N 2 + U O 2 + V CO kmols. Excess air coefficient : . Emission measurement devices indicate only Dry gas volume fractions. Volume fraction = mole fraction or ppm Volume fraction of CO 2 : x 1 = P * 100 /(P+R + T + U + V) Volume fraction of CO : x 2 = VCO * 100 /(P +R + T + U + V) Volume fraction of SO 2 : x 3 = R * 100 /(P +R + T + U + V) Volume fraction of O 2 : x 4 = U * 100 /(P +R + T + U + V) Volume fraction of N 2 : x 5 = T * 100 /(P +R + T + U + V) These are dry gas volume fractions.

8
Emission Standards 15% oxygen is recommended in exhaust. NO x upto 150 ppm. SO 2 upto 150 ppm. CO upto 500 ppm. HC upto 75 ppm. Volume fractions of above are neglected for the calculation of specific heat flue gas.

9
Specific Heat of flue gas :

10
For a given mass flow rate of fuel and air, the temperature of the exhaust can be calculated using above formula. If mass flow rates of fuel and air are known. Guess approximate value of specific heat of flue gas. Calculate T 0,ex. Calculate c p,flue gase. Re calculate T 0,ex. Repeat till the value of T 0,ex is converged.

11 Total Pressure Loss in Turbo Combustor The loss of pressure in combustor (p 0,ex

{ "@context": "http://schema.org", "@type": "ImageObject", "contentUrl": "http://images.slideplayer.com/13/3817461/slides/slide_11.jpg", "name": "Total Pressure Loss in Turbo Combustor The loss of pressure in combustor (p 0,ex

12
Gas Dynamic Studies on Combustors Effect of heat generation on one dimensional ideal compressible flow. Effect of varying mass flow rate. Effect of combined heat generation and friction.

13
Frictional Flow with Heat Transfer

14
Governing Equations no body forces, viscous work negligible Conservation of mass for steady flow: Conservation of momentum for frictional steady flow : Conservation of energy for steady flow :

15
Ideal Gas law : Mach number equation :

16
Simplification of Continuity Equation

17
Simplification of Momentum Equation

18
Combined Momentum and Continuity Equation

19
Constant flow rate, Constant Area, Non-reacting, Steady Compressible Flow with Friction Factor and Heat Generation Constant flow rate, Constant Area, Non-reacting, Steady Compressible frictionless Flow with Heat Generation

20
Supersonic RAM Jets Variation of Stagnation Temperature

Similar presentations

OK

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.

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.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on event handling in javascript output Ppt on information security in distributed mobile system Ppt on tourism in nepal Ppt on recycling of waste products Ppt on natural disasters for class 5 Presentation ppt on global warming Download ppt on turbo generator manufacturers Cardiopulmonary anatomy and physiology ppt on cells Ppt on diode characteristics conclusion Ppt on carburetor shop