Thermodynamics - Finding volume and clearance

Click For Summary
SUMMARY

The discussion focuses on calculating the volumes involved in an ideal Otto cycle for an automobile engine with a bore diameter of 10 cm, a displacement volume of 1925 cm³, and a stroke of 24.5 cm. Participants emphasize the importance of using the density of air at 25 degrees Celsius and 101 kPa to determine the volumes. The displacement volume is identified as the change in volume during the cycle, which is crucial for understanding the engine's performance metrics.

PREREQUISITES
  • Understanding of ideal Otto cycle principles
  • Knowledge of volume calculations in thermodynamics
  • Familiarity with the properties of air at varying temperatures and pressures
  • Basic mathematical skills for applying formulas
NEXT STEPS
  • Research the ideal gas law and its application in thermodynamics
  • Learn how to calculate density of gases at different temperatures and pressures
  • Explore the formulas for calculating clearance volume in engines
  • Study the relationship between displacement volume and engine performance metrics
USEFUL FOR

Engineers, automotive technicians, and students studying thermodynamics or internal combustion engine design will benefit from this discussion.

jacko113
Messages
2
Reaction score
0
an automobile engine operates an ideal otto cycle. Bore diameter of 10 cm and displacement volume of 1925 cm3 and stroke of 24.5 cm

mass of air per cylinder is 0.0026 kg with a temperature and pressure of intake air of 25 degrees celsius and 101 kPa.

Is this enough to find Volume 1, volume 2 , and or clearance?

if so how?

Im not asking for a solution , maybe just formulas or steps on solving it.
 
Last edited:
Physics news on Phys.org


Welcome to Physics Forums.

If you look up the density of air at the stated temperature and pressure, you should be able to calculate the volume.

The 1925 cm3 refers to the change in volume during the cycle.
 

Similar threads

Trouble solving for end state of two control volumes in a rigid tank
  • · Replies 12 ·
Replies
12
Views
3K
Calculating work of Otto cycle stages - Thermodynamics.
  • · Replies 1 ·
Replies
1
Views
3K
Adiabatic compressed air and energy calculations
  • · Replies 60 ·
3
Replies
60
Views
8K
Calculating Power Output of an Automobile Engine
  • · Replies 5 ·
Replies
5
Views
4K
Polytropic Process: Finding Final Pressure and Volume
  • · Replies 5 ·
Replies
5
Views
3K
Thank you for your response AM. I appreciate it and will work through the steps.
  • · Replies 1 ·
Replies
1
Views
2K
Otto Cycle - calculate the net work per cycle in Btu
  • · Replies 7 ·
Replies
7
Views
6K
Thermodynamics total engine displacement help
  • · Replies 2 ·
Replies
2
Views
3K
Otto Cycle Engine Homework: Total Work & Efficiency Calculation
  • · Replies 1 ·
Replies
1
Views
9K
Is the Combustion Chamber Volume for a Lamborghini Aventador Really That Small?
  • · Replies 10 ·
Replies
10
Views
5K