On the pressure wave emanating from a deflagration flame front

Area of Science:

• Fluid dynamics
• Combustion science
• Chemical engineering

Background:

• Spherical flame propagation is a fundamental phenomenon in combustion.
• Understanding transient pressure and velocity fields is crucial for safety and efficiency.
• Existing models may lack accuracy for complex deflagration scenarios.

Purpose of the Study:

• To develop an analytical model for predicting transient pressure and velocity fields ahead of a spherical flame.
• To validate the model using computational fluid dynamics (CFD) simulations.
• To assess the model's applicability to real-world hydrocarbon deflagration problems.

Main Methods:

• Analytical modeling of spherical flame expansion.
• Assuming a power-law relation for flame front evolution.
• Validation through CFD simulations.
• Comparison with experimental measurements from hydrocarbon deflagration tests.

Main Results:

• The analytical model successfully predicts transient pressure and velocity fields.
• CFD simulations confirm the model's predictions.
• The model accurately predicts experimental data from hydrocarbon deflagration tests.

Conclusions:

• The developed analytical model provides accurate predictions for spherical flame propagation.
• The model is a valuable tool for analyzing transient phenomena in deflagration.
• This research contributes to a better understanding and prediction of combustion events.