Pollution Control: Mach 1+ Exhaust Gas Pollution Checking

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Discussion Overview

The discussion revolves around the feasibility and methods for measuring pollution rates of exhaust gases from aircraft operating at supersonic speeds (Mach 1+). Participants explore the technical challenges and considerations related to pollution control in the context of a final year project focused on using catalytic converters.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • Some participants inquire about instruments for measuring exhaust gas pollution at Mach numbers greater than one.
  • One participant expresses skepticism about the practicality of installing a pollution measurement device in such conditions, questioning the rationale behind it.
  • A participant mentions that their project involves reducing aircraft pollution using catalytic converters, necessitating exhaust gas analysis for project approval.
  • Suggestions are made regarding the possibility of collecting exhaust gas using a sampling tube, with some participants asserting that this is a well-established practice.
  • Concerns are raised about the challenges of shunting off supersonic exhaust gas through a small tube, with requests for clarification on this method.
  • Participants encourage others to conduct their own research on combustion gas analyzers and the chemistry of combustion to better understand the topic.

Areas of Agreement / Disagreement

Participants express differing views on the practicality and methods for measuring pollution in supersonic exhaust gases. While some suggest established methods, others question their feasibility and the need for direct measurement in the exhaust stream. The discussion remains unresolved regarding the best approach to take.

Contextual Notes

Participants highlight the need for further research into the size and weight implications of scaling up catalytic converters for jet engines, indicating potential limitations in current understanding and assumptions about the technology.

majid hussain
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Is there any instrument for checking pollution rate of exhaust gas having mach number greater than one?
 
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majid hussain said:
Is there any instrument for checking pollution rate of exhaust gas having mach number greater than one?
On economic and maintenance point of view, I won't be putting any device there. Why there? What's your point of putting it there?
 
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Heey this is our final year project... "Reducing pollution of aircrafts by using catalitic converter" for that we have to check exhaust gas then only they will approve our project
 
If you have any ideas please share with me
 
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There is no need to put the sensor in the exhaust stream, just shunt-off a bit of it through a small tube.

Anyway, have you Googled "combustion gas analyzer" and done any research on what the word "pollution" means and how the combustion chemistry works?
 
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Yet...is it possible to collect exhaust gas having more than one mach no.
 
majid hussain said:
Yet...is it possible to collect exhaust gas having more than one mach no.
Certainly. Just use a sampling tube.
 
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@majid hussain

The sampling of exhaust gas from jet engines is a long established practice . Really you only have to do an internet search using some very obvious keywords to get all the information needed .

Before you do much more on your project though have a look at a catalytic converter for a car and then using ball park calculations scale it up for a jet engine - how big and how heavy is it going to be ??
 
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russ_watters said:
There is no need to put the sensor in the exhaust stream, just shunt-off a bit of it through a small tube.

Anyway, have you Googled "combustion gas analyzer" and done any research on what the word "pollution" means and how the combustion chemistry works?
How can we shunt-off a gas having supersonic mach no. With a small tube
 
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majid hussain said:
How can we shunt-off a gas having supersonic mach no. With a small tube
I like Nidum's advice: You need to start researching this yourself instead of asking us and having us research for you and give you the answers. I did an "obvious" google search and came up with some patents.
 
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