Effect of Compressibility on Contrail Ice Particle Growth in an Engine Jet
-
François Garnier
,
Ephi Maglaras
Abstract
In order to understand the formation process of condensation trails (contrails), the flow in the near field of an aircraft engine jet is studied by using the three-dimensional Large Eddy Simulation technique. The configuration consists of a hot round jet laden with soot particles. The particles are tracked using the Lagrangian approach, and their growth is calculated by a microphysics water vapour deposition model. A series of simulations are performed at a realistic Reynolds number (Re = 3.2 · 106) for two different jet Mach numbers: quasi-incompressible jet flow (M = 0.2) and compressible jet flow (M = 1). Whatever the Mach number used the ice crystals first appear at the edges of the jet where the hot and moist flow mixes with the cold and dry ambient air. Both the thermal transfers and the mass coupling, which are more significant for the quasi-incompressible jet flow, control the growth process.
©2014 by Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Analysis on Impulse Characteristics of PDRE with Exhaust Measurements
- Scramjet Propulsive Flowpath Design and Numerical Simulation
- Base Pressure Control with Annular Ribs
- Weighted Fuzzy Risk Priority Number Evaluation of Turbine and Compressor Blades Considering Failure Mode Correlations
- Effect of Compressibility on Contrail Ice Particle Growth in an Engine Jet
- Characteristics of Co-flow Jets from Orifices
- Experimental Investigation of the Loss Coefficients in a Linear Cascade
- Application of the Ultrasonic Oil Film Thickness Measurement System in Bearing Chambers
- Fatigue Lifetime Assessment of Aircraft Engine Disc via Multi-source Information Fusion
- Improvement on Main/backup Controller Switching Device of the Nozzle Throat Area Control System for a Turbofan Aero Engine
- Numerical and Experimental Investigation of Cavitating Characteristics in Centrifugal Pump with Gap Impeller
Artikel in diesem Heft
- Frontmatter
- Analysis on Impulse Characteristics of PDRE with Exhaust Measurements
- Scramjet Propulsive Flowpath Design and Numerical Simulation
- Base Pressure Control with Annular Ribs
- Weighted Fuzzy Risk Priority Number Evaluation of Turbine and Compressor Blades Considering Failure Mode Correlations
- Effect of Compressibility on Contrail Ice Particle Growth in an Engine Jet
- Characteristics of Co-flow Jets from Orifices
- Experimental Investigation of the Loss Coefficients in a Linear Cascade
- Application of the Ultrasonic Oil Film Thickness Measurement System in Bearing Chambers
- Fatigue Lifetime Assessment of Aircraft Engine Disc via Multi-source Information Fusion
- Improvement on Main/backup Controller Switching Device of the Nozzle Throat Area Control System for a Turbofan Aero Engine
- Numerical and Experimental Investigation of Cavitating Characteristics in Centrifugal Pump with Gap Impeller
