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LaVision ParticleMaster-Shadow 粒径测量系统
LaVision ParticleMaster-Shadow 粒径测量系统
LaVision ParticleMaster-Shadow 粒径测量系统
LaVision ParticleMaster-Shadow 粒径测量系统
LaVision ParticleMaster-Shadow 粒径测量系统
LaVision ParticleMaster-Shadow 粒径测量系统
LaVision ParticleMaster-Shadow 粒径测量系统
LaVision ParticleMaster-Shadow 粒径测量系统
LaVision ParticleMaster-Shadow 粒径测量系统
LaVision ParticleMaster-Shadow 粒径测量系统

LaVision ParticleMaster-Shadow 粒径测量系统

¥50万 - 60万

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SizingMaster-Shadow

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北京欧兰科技发展有限公司
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  • 第17年
  • 一般经销商
    • 营业执照已审核
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核心参数

仪器原理： 颗粒图象分析仪

分散方式： 干湿法分散

产地类别： 进口

重现性： <1%

测量范围： 5-3500微米

分辨率： 1微米

测量时间： 10-15秒

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High Resolution Shadow Imaging

High resolution imaging and special backlight illumination are the key components of the ParticleMaster Shadow system. As opposed to laser diffraction or interferometric methods shadowgraphy does not require transparent and spherical particles and, therefore, is a quite universal technique for comprehensive particle characterization.The ParticleMaster software package automatically identifies valid particles in an image series and calculates all particle properties with outstanding processing speed incl. statistical information in real-time.

Shadowgraphy can well be combined with other flow imaging methods like PIV or thermometry for use in multiphase flows.

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Tomographic Shadow Imaging

Our ParticleMaster 3D Shadow systems are based on tomographic shadow imaging. Using multiple shadow projections the tomographic reconstruction module in DaVis calculates the position and shape of particles, bubbles and droplets in 3D space. With time-resolved recordings particle trajectories with velocity and acceleration data are measured. 

Time-resolved tomographic shadow imaging was successfully applied in bubbly flows for 3D flow imaging of both phases.

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ParticleMaster Shadow System Features

  • simultaneous size, position and shape

  • particle number density (corrected for different size classes)

  • particle velocity derived from double frame exposures

  • velocity - size correlations, histograms, scatterplots

  • mass flux

  • visualization of ligaments, spray break-up and atomization

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Product Information

ParticleMaster
no-img3D Shadow Imaging in bubbly flows


相关方案

综合其他石油/化工环保能源/新能源航空航天
  • 气泡中分离,速度场检测方案(粒子图像测速)
    Vortex generator jets (VGJs) have proven to be effective in minimizing the separation losses on low-pressure turbine blades at low Reynolds numbers. Experimental data collected using phase-locked particle image velocimetry and substantiated with a hot-film anemometer were used to answer fundamental questions about the influence of VGJs on a separated boundary layer. The data were collected on the suction surface of the Pack B blade profile, which has a non-reattaching separation bubble beginning at 68% axial chord. Two VGJ pulse histories were created with different frequencies, jet durations,and duty cycles. The mechanisms responsible for boundary layer separation control were shown to be a combination of boundary layer transition and streamwise vortical structures. Jet duration and relaxation time were important VGJ characteristics in determining the extent of control. The unsteady environment characterisitic of the low-pressure turbine section in a gas turbine engine effectively reduces the time-averaged separation zone by as much as 35%. Upstream blade rows create unsteady flow disturbances (wakes) that transition the flow. This transitioned flow propagates downstream, re-attaching the separation bubbles on the subsequent blade row. Phase-locked PIV and hot-film measurements were used to document the characteristics of this separation zone when subjected to synchronized unsteady wakes and VGJs. The phase difference between VGJ actuation and the wake passing, blowing ratio, and VGJ duration were optimized to achieve the greatest timeaveraged control of the separation zone. The experimental data were used to identify the important characteristics of the wake/jet interaction. Phase-locked PIV measurements were taken to isolate the wake event.

    其他 2008-06-05

  • 喷雾,液滴中粒径,速度场检测方案(激光粒度仪)
    Particle sizing and velocity measurements are undertaken in an atomizing water mist jet impinging onto a heated copper plate. This study forms part of an investigation into the heat transfer and flow field obtained from the mist jet. The droplet sizes obtained are compared to manufacturer’s data. This analysis is performed for the near field and mid field. Ultimately, the effects of particle sizes and velocities will aid the understanding of the heat transfer mechanisms involved.

    其他 2011-03-03

  • 油漆,液滴中粒径，速度，荷质比分布，静电旋转钟喷雾模拟检测方案(激光粒度仪)
    High-speed electrostatic rotary bells are widely used in the automotive industry as they provide high quality paint films with better transfer efficiency compared to air-atomizing guns. However, due to its highly turbulent spray pattern, transfer efficiency is still not ideal, i.e. some portion of paint will not reach intended target surfaces and becomes overspray. Numerical simulation of the electrostatic spraying process provides a tool to model this process as well as a way to optimize transfer efficiency. Currently, the state-of-the-art simulation model can simulate the flying trajectories of paint droplets from the edge of the rotating bell cup to the target surfaces. It requires some input information to start the simulation. The input information includes paint droplet size, velocity, and charge-to-mass ratio. Due to its large number of droplets, distributions based on droplet diameters are used to represent the entire droplet population. This paper describes experimental and mathematical methods to measure and calculate paint droplet size, velocity, and charge-to-mass ratio distributions. The resulting information can then be organized and used as the input data files for Electrostatic spray painting simulation.

    石油/化工 2012-01-24

  • 喷嘴,喷雾中流量,速度场检测方案(激光粒度仪)
    Detailed atomization measurements in actual sprinklers are needed for proper spray specification in suppression modeling and analysis. In basic pendant sprinkler configurations, the spray originates from two streams corresponding to flow deflected along the tines of the pendant and flow passing through the void spaces between the tines. In this study, measurements of flow splits (between space and tine streams), sheet breakup distances, drop size, and drop velocity measurements were performed over a range of sprinkler geometries and injection pressures to characterize the near-field sprinkler spray. These detailed measurements were used to support the development of scaling laws describing the effects of injector geometry and injection conditions on sprinkler discharge characteristics.

    其他 2011-03-07

  • 气泡中分离,速度场检测方案(粒子图像测速)
    Vortex generator jets (VGJs) have proven to be effective in minimizing the separation losses on low-pressure turbine blades at low Reynolds numbers. Experimental data collected using phase-locked particle image velocimetry and substantiated with a hot-film anemometer were used to answer fundamental questions about the influence of VGJs on a separated boundary layer. The data were collected on the suction surface of the Pack B blade profile, which has a non-reattaching separation bubble beginning at 68% axial chord. Two VGJ pulse histories were created with different frequencies, jet durations,and duty cycles. The mechanisms responsible for boundary layer separation control were shown to be a combination of boundary layer transition and streamwise vortical structures. Jet duration and relaxation time were important VGJ characteristics in determining the extent of control. The unsteady environment characterisitic of the low-pressure turbine section in a gas turbine engine effectively reduces the time-averaged separation zone by as much as 35%. Upstream blade rows create unsteady flow disturbances (wakes) that transition the flow. This transitioned flow propagates downstream, re-attaching the separation bubbles on the subsequent blade row. Phase-locked PIV and hot-film measurements were used to document the characteristics of this separation zone when subjected to synchronized unsteady wakes and VGJs. The phase difference between VGJ actuation and the wake passing, blowing ratio, and VGJ duration were optimized to achieve the greatest timeaveraged control of the separation zone. The experimental data were used to identify the important characteristics of the wake/jet interaction. Phase-locked PIV measurements were taken to isolate the wake event.

    其他 2008-06-05

  • 喷雾,液滴中粒径,速度场检测方案(激光粒度仪)
    Particle sizing and velocity measurements are undertaken in an atomizing water mist jet impinging onto a heated copper plate. This study forms part of an investigation into the heat transfer and flow field obtained from the mist jet. The droplet sizes obtained are compared to manufacturer’s data. This analysis is performed for the near field and mid field. Ultimately, the effects of particle sizes and velocities will aid the understanding of the heat transfer mechanisms involved.

    其他 2011-03-03

  • 喷嘴,喷雾中流量,速度场检测方案(激光粒度仪)
    Detailed atomization measurements in actual sprinklers are needed for proper spray specification in suppression modeling and analysis. In basic pendant sprinkler configurations, the spray originates from two streams corresponding to flow deflected along the tines of the pendant and flow passing through the void spaces between the tines. In this study, measurements of flow splits (between space and tine streams), sheet breakup distances, drop size, and drop velocity measurements were performed over a range of sprinkler geometries and injection pressures to characterize the near-field sprinkler spray. These detailed measurements were used to support the development of scaling laws describing the effects of injector geometry and injection conditions on sprinkler discharge characteristics.

    其他 2011-03-07

  • 微通道气泡中堵塞现象检测方案(流量计)
    This paper highlights the influence of contact line (pinning) forces on the mobility of dry bubbles in microchannels. Bubbles moving at velocities less than the dewetting velocity of liquid on the surface are essentially dry, meaning that there is no thin liquid film around the bubbles. For these “dry” bubbles, contact line forces and a possible capillary pressure gradient induced by pinning act on the bubbles and resist motion. Without sufficient driving force (e.g. external pressure) a dry bubble is brought to stagnation. For the first time, a bipartite theoretical model that estimates the required pressure difference across the length of stagnant bubbles with concave and convex back interfaces to overcome the contact line forces and stimulate motion is proposed. To validate our theory, the pressure required to move a single dry bubble in square microchannels exhibiting contact angle hysteresis has been measured. The working fluid was deionized water. The experiments have been conducted on coated glass channels with different surface hydrophilicities that resulted in concave and convex back interfaces for the bubbles. The experimental results were in agreement with the model’s predictions for square channels. The predictions of the concave and convex back models were within 19% and 27% of the experimental measurements, respectively.

    其他 2016-11-10

  • 油漆,液滴中粒径，速度，荷质比分布，静电旋转钟喷雾模拟检测方案(激光粒度仪)
    High-speed electrostatic rotary bells are widely used in the automotive industry as they provide high quality paint films with better transfer efficiency compared to air-atomizing guns. However, due to its highly turbulent spray pattern, transfer efficiency is still not ideal, i.e. some portion of paint will not reach intended target surfaces and becomes overspray. Numerical simulation of the electrostatic spraying process provides a tool to model this process as well as a way to optimize transfer efficiency. Currently, the state-of-the-art simulation model can simulate the flying trajectories of paint droplets from the edge of the rotating bell cup to the target surfaces. It requires some input information to start the simulation. The input information includes paint droplet size, velocity, and charge-to-mass ratio. Due to its large number of droplets, distributions based on droplet diameters are used to represent the entire droplet population. This paper describes experimental and mathematical methods to measure and calculate paint droplet size, velocity, and charge-to-mass ratio distributions. The resulting information can then be organized and used as the input data files for Electrostatic spray painting simulation.

    石油/化工 2012-01-24

  • 柴油喷雾中柴油喷雾的高速摄影研究检测方案(激光粒度仪)
    Fuel atomization and dispersion phenomena depend heavily on the ambient pressure and temperature. So in this work, to study diesel sprays, an electrically heated, constant volume, pressurized vessel was designed and manufactured. The controlling electronics and software were developed and tested to ensure safe and precise operation. A commercial six-hole automotive Diesel injector was used. Spray tip penetration and cone angle have extensively been used to qualify fuel dispersion and these parameters were quantified in this work using a high speed shadowgraph technique. It was observed that the temporal spray tip-penetration did not follow a time-square-root law.

    石油/化工 2013-02-13

  • USP溶解仪中速度场检测方案(CCD相机)
    采用LaVison公司的DaVis软件平台，通过阴影发成像和粒子成像测速分析，对脉冲流场在USP溶解仪中引起的水动力复杂性，进行了研究。

    石油/化工 2019-12-03

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是否可延长保修期: 是

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报修承诺: 一周内到达用户现场开始维修

相关仪器 相关资料
  • DaVis-PIV系统图像数据采集和硬件控制的集成软件平台

    DaVis是德国LaVsion公司推出的应用于反应和非反应流场测量，材料表面成像和追迹以及超快成像的智能（激光）成像技术的完整软件平台。 DaVis以灵活的图像采集模块，可用户定制的应用界面和特殊应用软件包三大特色功能成就了完美的成像系统所需软件。 DaVis软件可满足用户以纳秒量级的精度进行相机曝光，外部照明以及外部触发的同步控制并能自由选择采集图像序列。除此之外，DaVis软件拥有各种成像设置和控制的功能。 DaVis软件对用户开放，这种特色结合软件本身的宏命令语言，能够使得成像系统快速适应从高深的科学研究到可靠的工业应用等各种不同测量需求。 不仅如此，DaVis还拥有灵活的图像采集模式，先进的图像处理算法，多维图像数据的智能存储和显示，多种硬件的软件控制等功能。 集成了2DPIV和3DPIV功能模块的DaVis软件，参加了连续三年的PIVChallenge（http://www.pivchallenge.org）评测活动，均取得了优异成绩。客观证明了DaVis软件平台的出色性能。 PIVChallenge的组织者将两次PIVChallenge 活动的结果作了详尽的总结，并将结果发表在了公开的网站和杂志上。有关文章和下载网址如下： 1. Stanislas M, Okamoto K, Kaehler C (2003) Main results of the First International PIV Challenge. Meas Sci Technol 14:R63-R89 下载地址： http://stacks.iop.org/0957-0233/14/R63 或： http://www.oplanchina.com/download/Stanislas PIV challenge 2001.pdf 2. Stanislas M, Okamoto K, Kaehler C, Westerweel J (2005) Main results of the Second International PIV Challenge. Exp Fluids 39: 170-191 下载地址：http://www.oplanchina.com/download/PIV Challenge 2003 Results.pdf

    2171MB 2008-01-19
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