A laminar spray group combustion experiment (LSGCE) with in situ image diagnostic methods and image analysis...

Area of Science:

• Combustion Science
• Fluid Dynamics
• Optical Diagnostics

Background:

• Spray combustion is crucial for engine efficiency.
• Understanding non-dilute spray combustion requires well-defined experimental data.
• Existing experimental setups often lack detailed, synchronized measurements.

Purpose of the Study:

• To develop a novel experimental platform for studying spray combustion.
• To enable synchronous capture of microscopic droplet and macroscopic flame behavior.
• To provide high-quality data for validating combustion models.

Main Methods:

• A cylindrical quasi-laminar spray was generated and ignited using a hot wire.
• Synchronous in situ microscopic droplet imaging and macroscopic flame imaging were employed.
• Image analysis algorithms were developed for droplet statistics and flame propagation data.

Main Results:

• The platform successfully generated a stable spray and captured detailed droplet and flame dynamics.
• Droplet statistics (diameter, velocity, number density) and flame characteristics (size, location, speed) were obtained.
• The system operates across a wide range of conditions (Gig: 0.01-0.06, Temp: RT-1400 K).

Conclusions:

• The developed experimental platform offers a simple yet effective configuration for spray combustion research.
• It provides essential data for advancing the understanding and modeling of spray combustion.
• The platform's compact design allows for potential integration into microgravity facilities.