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With increase in compression ratio, flame speed
- a)Increases
- b)Decreases
- c)Remains the same
- d)First decreases and then increases
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
With increase in compression ratio, flame speeda)Increasesb)Decreasesc...
Increased compression ratio reduces the clearance volume and therefore increases the density of the cylinder gases during burning. This increases the peak pressure and temperature and the total combustion duration is reduced. Thus engines having higher compression ratio have higher flame speed.
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With increase in compression ratio, flame speeda)Increasesb)Decreasesc...
Explanation:
Increasing the compression ratio in an engine can have a significant impact on the combustion process and flame speed. Below are some key points to explain why flame speed increases with an increase in compression ratio:
Effect of Compression Ratio on Flame Speed:
- As the compression ratio increases, the air-fuel mixture is compressed to a higher pressure and temperature before ignition.
- This higher pressure and temperature result in a more rapid and efficient combustion process.
- The increased compression ratio leads to a more homogeneous mixture which promotes faster flame propagation.
- The higher pressure also increases the rate of heat release during combustion, leading to a faster flame speed.
Factors Influencing Flame Speed:
- The flame speed is influenced by various factors such as the air-fuel ratio, turbulence, temperature, and pressure.
- A higher compression ratio generally results in a higher temperature and pressure in the combustion chamber, which in turn increases the flame speed.
Overall Impact:
- Therefore, with an increase in compression ratio, the flame speed tends to increase due to the more favorable conditions for combustion.
- This faster flame speed can lead to improved engine performance, efficiency, and power output.
In conclusion, increasing the compression ratio in an engine typically results in an increase in flame speed due to the enhanced combustion conditions created by higher pressure and temperature levels.
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With increase in compression ratio, flame speeda)Increasesb)Decreasesc)Remains the samed)First decreases and then increasesCorrect answer is option 'A'. Can you explain this answer?
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