K-2013 Effect of Nozzle Hole Flow Coefficient on Spray Characteristics of Diesel Nozzle

2001 ◽  
Vol II.01.1 (0) ◽  
pp. 513-514
Author(s):  
Kiyomi KAWAMURA ◽  
Norikazu KATSUMI ◽  
Reiko UEDA ◽  
Kiyomi NAKAKITA ◽  
Akinori SAITO ◽  
...  
Keyword(s):  
Flow Coefficient ◽  
Spray Characteristics ◽  
Diesel Nozzle ◽  
Nozzle Hole

Study on Influence of Nozzle Structure on Flow in Diesel Nozzle Orifice

2012 ◽  
Vol 246-247 ◽  
pp. 127-130
Author(s):  
Bing Li ◽  
Xue Song Hu ◽  
Xiao Feng Cao ◽  
Gui Qi Jia ◽  
Fang Xi Xie ◽  
...  
Keyword(s):  
Flow Characteristics ◽  
Internal Flow ◽  
Key Factors ◽  
Complex Flow ◽  
Two Phase ◽  
Nozzle Orifice ◽  
Fuel Flow ◽  
Flow Features ◽  
Diesel Nozzle ◽  
Nozzle Hole

The fuel flow characteristics in diesel nozzle orifice are key factors to the atomization of fuel near the nozzle orifice. In the paper, two-phase flow model is used to simulate the complex flow features in nozzle orifice, and to study the influences of the relative position of nozzles orifice axis and nozzle axis, and inclination angle of nozzle hole on the internal flow feature.

G0700504 Effect of nozzle hole diameter on diesel spray characteristics

2015 ◽  
Vol 2015 (0) ◽  
pp. _G0700504--_G0700504-
Author(s):  
Yuki MORIMOTO ◽  
Hironobu UEKI ◽  
Noritsune KAWAHARADA ◽  
Daisaku SAKAGUCHI
Keyword(s):  
Hole Diameter ◽  
Diesel Spray ◽  
Spray Characteristics ◽  
Nozzle Hole

scholarly journals Effects of Nozzle Shape on the Flow Characteristics of Premix Injector Using Computational Fluid Dynamics (CFD)

2015 ◽  
Vol 773-774 ◽  
pp. 450-454
Author(s):  
Ronny Yii Shi Chin ◽  
Shahrin Hisham Amirnordin ◽  
Amir Khalid
Keyword(s):  
Flow Characteristics ◽  
Fuel Injector ◽  
Spray Characteristics ◽  
Hole Shape ◽  
Injector Nozzle ◽  
K Factor ◽  
Efficient Combustion ◽  
Nozzle Hole ◽  
Nozzle Geometries ◽  
Air Nozzle

The burner system is a patented, unique, higher-efficiency and fuel-injector system that works with a specially designed oil burner to create ultra-efficient combustion that reduces oil use, greenhouse gases and other harmful emissions. This research shows the injector nozzle geometries play a significant role in spray characteristics, atomization and formation of fuel-air mixture in order to improve combustion performance, and decrease some pollutant products from burner system. The aim of this research is to determine the effects of nozzle hole shape on spray characteristics of the premix injector by using CFD. Multiphase of volume of fluid (VOF) cavitating flow inside nozzles are determined by means of steady simulations and Eulerian-Eulerian two-fluid approach is used for performing mixing of Jatropha oil and air. Nozzle flow simulations resulted that cavitation area is strongly dependent on the nozzle hole shape. Conical hole with k-factor of 2 provides higher flow velocity and turbulent kinetic energy compared with conical hole with k-factor of 1.3 and cylindrical hole. The results show that the premix injector nozzle hole shape gives impact to the spray characteristics and indirectly affects the emission of the system.

Influence of Internal Cavitating Flow of the Nozzle on Spray Characteristics in a Diesel Engine

2012 ◽  
Vol 468-471 ◽  
pp. 1874-1877
Author(s):  
Ju Yan Liu ◽  
Zhi Xia He ◽  
Qian Wang ◽  
Zhao Chen Jiang ◽  
Li Li Tian
Keyword(s):  
Diesel Engines ◽  
Optimization Design ◽  
Theoretical Foundation ◽  
Cavitating Flow ◽  
Fuel Spray ◽  
Sauter Mean Diameter ◽  
Spray Characteristics ◽  
Fuel Atomization ◽  
Different Types ◽  
Nozzle Hole

Fuel atomization and penetration are known to significantly affect the combustion and emission processes in diesel engines. In the fuel supply system of diesel engines, the internal cavitaing flow of the nozzle is one of the most important effects on fuel spray characteristics. So it is necessary to simulate fuel spray coupling with internal cavitaing flow of the nozzle. In order to analyze the influence of cavitaing flow in the nozzle hole on spray, a coupling spray simulation was carried out with the output data of cavitaing flow in nozzles using FIRE v2010. The results of this work show that the characteristics of cavitating flow in orifice have an effect on both macroscopic properties, such as spray tip penetration and spray symmetry, and microscopic properties, like Sauter Mean Diameter-SMD. Moreover, the spray characteristics from three different types of nozzle were simulated to study the effect of nozzle structure on internal cavitating flow and subsequent spray, which supplies the theoretical foundation for the optimization design of the injector.

scholarly journals Numerical Analysis of Nozzle Hole Shape to the Spray Characteristics from Premix Injector in Burner System : A Review

2015 ◽  
Vol 773-774 ◽  
pp. 610-614
Author(s):  
Ronny Yii Shi Chin ◽  
Shahrin Hisham Amirnordin ◽  
Norani Mansor ◽  
Amir Khalid
Keyword(s):  
Review Paper ◽  
Fuel Injection ◽  
Operating Conditions ◽  
Injection System ◽  
Breakup Process ◽  
Spray Characteristics ◽  
System A ◽  
Primary Breakup ◽  
Nozzle Hole ◽  
Shaped Nozzle

Fuel injection system is widely used in the field of burner system nowadays. Spray nozzles having various operating conditions depends on the design of nozzle and it is precision components designed to perform very specific spray characteristics under specific conditions. This review paper focuses on spray characteristics, effects of geometry of injector, influence of fuel and hole shaped nozzle with cylindrical and conical holes on spray characteristics. The parameters were discussed based on an overview of the research in the field of simulations with nozzle shaped injectors. A massive majority researcher reported that conical nozzle hole is better due to it contributed suppression of cavitation in nozzle hole, slowed down primary breakup process and thus produced larger spray droplets, high spray penetration.

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