Comparison of PIV and PDA droplet velocity measurement techniques on two high-pressure water mist nozzles

Husted, Bjarne; Petersson, Per; Lund, Ivar; Holmstedt, Göran

doi:10.1016/j.firesaf.2009.07.003

Cited by 89 publications

(61 citation statements)

References 16 publications

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“…From the observation of the machining setup and particle distribution, the nozzle distance was selected 3, 6, 7 and 9 mm from the cutting insert edge to evaluate the performance of MQL using different nozzle distance. distance from the nozzle to the tool tip increases the efficiency of oil spraying drastically and makes the MQL machining more stable [8].…”

Section: Resultsmentioning

confidence: 99%

Determination of Mist Flow Characteristic for MQL Technique Using Particle Image Velocimetry (PIV) and Computer Fluid Dynamics (CFD)

Rahim

Dorairaju

Asmuin

et al. 2015

AMM

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Abstract. In recent years, minimum quantity lubrication (MQL) machining is regarded as a promising method for reducing machining cost and cutting fluid, while improving cutting performance. However the effectiveness and the working principle of MQL are still questionable with very few explanations provided. The aim of this study is to determine the optimum distance between the nozzle and tool tip and appropriate flow pattern of the mist flow for minimum quantity lubricant using Particle Image Velocimetry (PIV) and Computer Fluid Dynamic (CFD) for optimizing the spraying conditions thus reducing the lubricant consumption. The spray from the nozzle with outlet diameter of 2.5 mm is analysed using Particle Image Velocimetry (PIV) to measure the mist flow velocity and identify the flow pattern. The input pressure of 0.2, 0.3 and 0.4 MPa will be discharged throughout the experiment. Higher pressure produce more mass flow rate which helps in reducing the cutting force and cutting temperature efficiently and prolong tool life. Thus the appropriate distance can reduce lubricant consumption and increase the cooling and lubricating ability with best nozzle position. The applied distance increases the efficiencies of MQL applied during machining process. IntroductionDue to serious concern about ecological and economical and most importantly occupational pressure, many machining industry are turning towards dry machining to eliminate the usage of metal working fluids. Multitude researches have been conducted to replace wet machining.[1] Wet machining are not highly desirable due to its affects that causes respiration and skin problems to the workers who are highly exposed during machining process.[2] Meanwhile, in dry machining metal working fluids are not used thus leaving a dry and easy to clean workplace. Despite the advantages of the dry machining, there are some limitations in dry machining that leads to the usage of metal working fluids. Dry machining can be less effective when higher machining efficiency, better surface finish quality and severer cutting conditions are required. By taking into consideration of the ecological and economical problems, implementing near dry machining or minimal quantity lubrication (MQL) would be the best technique to control or to reduce the metal working fluid consumption. Based on studies done using MQL technique have shown reduction in friction coefficient and cutting temperature compare with dry and wet machining. [3] In MQL cutting, a small amount of biodegradable oil, which is mixed with compressed air to form oil mist, generated using a process called atomization is applied to the cutting point instead of the flood supply of water-miscible or water-immiscible cutting fluids to lubricate, reduce temperature and to enhance the tool life during the machining process [4]. For example, it was assumed that the oil can penetrate the tool-workpiece interface due to high pressure of the compressed air that serves as a vehicle for the oil droplets [5,6]. No comparison was made between the...

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Section: Resultsmentioning

confidence: 99%

Determination of Mist Flow Characteristic for MQL Technique Using Particle Image Velocimetry (PIV) and Computer Fluid Dynamics (CFD)

Rahim

Dorairaju

Asmuin

et al. 2015

AMM

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“…Although there were some temperature increase during the initial period of mist introduction, however in general the fires can be extinguish in a relatively short period of time. In addition, according to the literature the spray characteristics of individual nozzle, as well as multi nozzle arrangements, which are represented by spray coverage area, fluxs of water mist, and spray momentum are also important factors for extinguishing cooking oil fires [1][2][3][4]10]. Water mist coverage must be large enough to cover the entire oil surface and extinguish the whole flames over the oil surface at once, otherwise the flames will not be extinguished.…”

Section: Resultsmentioning

confidence: 99%

“…Water mist can also block the thermal radiation and pre-wet other combustibles in the neighborhood to reduce their temperature and delay the ignition. However, there is still a need to quantify the properties of water mist using sophisticated tools such as PIV and PDA systems [10]. In addition there is still limited general consensus on the design method for water mist fire protection systems, despite some water mist an attractive alternative for fire control [4].…”

Section: Introductionmentioning

confidence: 99%

Concept Design and Testing of Multi-Nozzle Water Mist Fire Suppression System

Sumarsono¹,

Nugroho²,

Mariance³

et al. 2011

MST

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In this work a flexible design of multi-nozzle arrangement of water mist fire suppression system was studied. The source of fire was a 65 mm diameter cooking oil fire. An investigation on the impact of nozzle arrangement on the temperature profile of fires was conducted. The occurance of oil splash due to the application of water mist was also studied. The water mist systems developed in the present work can effectively extinguish cooking oil fires and prevented them from re-ignition. The spray angle, discharge pressure, and water flow rate were important factors to determine the effectiveness of water mist in extinguishing cooking oil fires.

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“…Among them, we chose Mieplot 4.3 by Laven (2011), which supports the import of external refractive indices. Its reliability has been verified by many researchers (Riley et al 2004;Husted et al 2009;Shen and Wang 2010;Kinnunen et al 2011). The refractive index value of polystyrene was adopted from Palik (1991).…”

Section: Lts Theorymentioning

confidence: 99%

Development of a Real-Time,In-SituParticle Sizing Technique: Real-Time Light Transmission Spectroscopy (RTLTS)

Yoon¹,

Chun²

2013

Aerosol Science and Technology

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We developed an improved particle measurement spectroscopic technique, real-time laser transmission spectroscopy (RTLTS), to detect the number-weighted distribution of particles in real time. The measurement system used a deuterium-tungsten lamp for the light source and a spectrometer as the detector. The operating wavelength range was 300-810 nm. To obtain a physically reasonable number concentration from the experimental results, a sequential regularization method was used during the calculations. To verify the feasibility and reliability of RTLTS, the number-weighted distribution of polystyrene particle suspensions was determined over diameters ranging from 0.005 to 2.000 μm in 0.005-μm increments. The measured concentration error was 0.67-32.67%. A mean diameter of the smallest particle we had detected was 0.09 μm, with a 16% oversizing. The measurable concentration range was ∼10 8 #/cc to ∼10 11 #/cc for 0.895-μm-diameter particles. The measurable concentration range could be adjusted simply by changing the system configuration. This technique is available for both waterborne and airborne particles.

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Comparison of PIV and PDA droplet velocity measurement techniques on two high-pressure water mist nozzles

Cited by 89 publications

References 16 publications

Determination of Mist Flow Characteristic for MQL Technique Using Particle Image Velocimetry (PIV) and Computer Fluid Dynamics (CFD)

Determination of Mist Flow Characteristic for MQL Technique Using Particle Image Velocimetry (PIV) and Computer Fluid Dynamics (CFD)

Concept Design and Testing of Multi-Nozzle Water Mist Fire Suppression System

Development of a Real-Time,In-SituParticle Sizing Technique: Real-Time Light Transmission Spectroscopy (RTLTS)

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