Heat transfer and fluid flow aspects of a small scale single droplet fuel-coolant interaction

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5401530

Kim, B J

This research studied the fluid mechanics and heat transfer aspects of a small-scale single droplet fuel-coolant interaction (FCI). Past experimental and analytical investigations on this subject and the modeling of the FCI are reviewed. The modeling of the small-scale FCI is conceptually divided into four stages, the last three of which occur cyclically: transient film boiling around a spherical fuel droplet, vapor film collapse and the coolant jet formation, jet penetration and the entrainment of coolant drops in the fuel, and the expansion and fragmentation of the fuel. Models for each stage were developed based upon the detailed analysis of the phenomena. Results of each stage and the effects of the parameters involved are discussed. Justification of each submodel is independently established and then they are combined together to describe the whole FCI process. The model simulates the cyclic behavior of the FCI. The time scale for each bubble-growth-and-collapse is in good agreement with the experimental results depending on the bubble diameter. The increase in the total surface area of the fuel due to the fragmentation of the fuel seems reasonable. However, the model suffers from a couple of discrepancies when compared to experimental findings.

• Research Organization: Wisconsin Univ., Madison (USA)
• OSTI ID: 5401530
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200101 -- Fossil-Fueled Power Plants-- Cooling & Heat Transfer Equipment & Systems
33 ADVANCED PROPULSION SYSTEMS
330100 -- Internal Combustion Engines
42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
BOILING
CHEMICAL REACTIONS
COOLANTS
DROPLETS
ENERGY TRANSFER
FILM BOILING
FLOW MODELS
FLUID FLOW
FUELS
HEAT TRANSFER
LIQUID FUELS
MATHEMATICAL MODELS
PARTICLES
PHASE TRANSFORMATIONS