Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Cavitation in Transient Flows Through a Micro-Nozzle
View through CrossRef
High cavitating or supercavitating flows in fuel injector systems are crucial since they improve the mixing and the fuel atomization into combustion chambers, decreasing both fuel consumption and pollutant emissions. However, there is a lack of information regarding the required time to obtain high cavitating flows at the nozzle outlet, from the start of the injection pulse. In this work, a new method to quantify the time to get supercavitating flows at the nozzle outlet is developed. In particular, the delay in the inception of a supercavitating flow through a micronozzle is numerically analyzed for different pressure drops in a well-studied benchmark for fuel injectors. The three-dimensional simulations show that a delay higher than 100 μs is necessary for moderate pressure drops. Nevertheless, the delay tends to decay by rising amplitudes of the pressure pulse, reaching a saturation value of around 65 μs.
Title: Cavitation in Transient Flows Through a Micro-Nozzle
Description:
High cavitating or supercavitating flows in fuel injector systems are crucial since they improve the mixing and the fuel atomization into combustion chambers, decreasing both fuel consumption and pollutant emissions.
However, there is a lack of information regarding the required time to obtain high cavitating flows at the nozzle outlet, from the start of the injection pulse.
In this work, a new method to quantify the time to get supercavitating flows at the nozzle outlet is developed.
In particular, the delay in the inception of a supercavitating flow through a micronozzle is numerically analyzed for different pressure drops in a well-studied benchmark for fuel injectors.
The three-dimensional simulations show that a delay higher than 100 μs is necessary for moderate pressure drops.
Nevertheless, the delay tends to decay by rising amplitudes of the pressure pulse, reaching a saturation value of around 65 μs.
Related Results
Research progress in hydrofoil cavitation prediction and suppression methods
Research progress in hydrofoil cavitation prediction and suppression methods
To reduce the adverse damage caused by cavitation phenomena to the hydraulic machinery, such as surface erosion of the equipment, increased mechanical vibration, and decreased serv...
Regression analysis of impulse characteristics shorted supersonic nozzle
Regression analysis of impulse characteristics shorted supersonic nozzle
When designing and testing rocket engines, an important problem is the choice of the contour of the supersonic part of the nozzle. Recently, with the development of rock-et and spa...
Non-Spherical Cavitation Bubbles: A Review
Non-Spherical Cavitation Bubbles: A Review
Cavitation is a phase-change phenomenon from the liquid to the gas phase due to an increased flow velocity. As it causes severe erosion and noise, it is harmful to hydraulic machin...
The Cavitation Nuclei Transient Characteristics of Lennard-Jones Fluid in Cavitation Inception
The Cavitation Nuclei Transient Characteristics of Lennard-Jones Fluid in Cavitation Inception
Abstract
In the field of ocean engineering, cavitation is widespread, for the study of cavitation nuclei transient characteristics in cavitation inception, we app...
Obtaining the Synthetic Fuels from Waste Plastic and Their Effect on Cavitation Formation in a Common-Rail Diesel Injector
Obtaining the Synthetic Fuels from Waste Plastic and Their Effect on Cavitation Formation in a Common-Rail Diesel Injector
The presented paper addresses two significant issues of the present time. In general, the studies of the effect of synthetic fuels on cavitation formation and cavitation erosion pr...
Optical Flow Measurement of Cavitation in a Converging-Diverging Nozzle Using High-Speed Imagery
Optical Flow Measurement of Cavitation in a Converging-Diverging Nozzle Using High-Speed Imagery
Cavitation is a phenomenon where liquids will vaporize when subjected to low pressures. Essentially, the pressure is reduced sufficiently such that the liquid boils at the given te...
CFD INVESTIGATION OF TURBULENT WATER FLOW IN A PIPE ELBOW: ASSESSMENT OF CAVITATION RISK
CFD INVESTIGATION OF TURBULENT WATER FLOW IN A PIPE ELBOW: ASSESSMENT OF CAVITATION RISK
Cavitation represents the formation and subsequent collapse of vapor or gas bubbles in the vicinity of solid surfaces. Depending on the mechanism of initiation, cavitation can be c...
Effect of Inlet Pressure on the Polyurethane Spray Nozzle for Soil Cracking Improvement: Simulations using CFD Method
Effect of Inlet Pressure on the Polyurethane Spray Nozzle for Soil Cracking Improvement: Simulations using CFD Method
Rigid spray polyurethane (RSPU) was commercially used as an injection in crack walls or soil surfaces to enhance material performance, increase lifetime, and save operating costs. ...