Imager pro X PIV相机

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LaVision GmbH

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Imager pro X

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欧洲

北京欧兰科技发展有限公司

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第17年
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Depending on the requirements for your specific application LaVision offers different PIV cameras.

Imager pro X camera family offers high sensitive sensors and electronics, most efficient use of memory in camera head, low readout noise, high spatial resolution in combination with shortest interframe times dt.

相关方案

综合其他医疗/卫生生物产业航空航天环保

圆柱尾迹,湍流,三维相干结构中3D3C速度矢量场,速度场,体视速度场,层析速度场检测方案(粒子图像测速)
The wake of a circular cylinder at Re = 2700 is investigated by means of Tomographic PIV (Tomo-PIV), a recently developed three-dimensional velocimetry technique. The paper presents the principles of Tomo-PIV and discusses in details the implementation of the technique to the experimental conditions. With a measurement volume of approximately 40x40x10 mm2 two configurations are chosen in order to describe both the 2D wake features and the span wise organization of secondary rollers dominating the 3D flow organization. The present data allow to directly evaluate the measurement error imposing mass conservation inside the volume (viz. solenoidal velocity field). The visualization of the wake instantaneous structure is obtained by means of vorticity vector magnitude iso-surfaces, or decomposing the vorticity in the span wise and stream-wise(normal)/bi-normal component, which return the separate contribution of the Kármán rollers and the interconnecting structures between them respectively. The properties of the secondary rollers are given in terms of span wise wavelength, peak vorticity, vorticity stretching and their size and shape. A value of the span wise wavelength λ z/D = 1.2 is recurring and the rollers organization into pairs is found to be similar to the instability Mode B occurring in lower Reynolds number wakes investigated with previous studies.
其他 2008-06-14
流体中速度场,速度矢量场检测方案(粒子图像测速)
Lifting surfaces are used both for propulsion and control of sea vessels and must meet performance criteria such as lift, drag, and (in some military applications)hydroacoustic noise limits. Design tools suitable to predict such criteria must handle complex flow phenomena and manage the wide range of flow scales inherent in marine applications (Reynolds numbers ~108). To date, the development of such tools has been limited by the lack of controlled experimental data in this high Reynolds numbers range. Lifting surface flow is the focus of current high Reynolds number experiments involving a two-dimensional hydrofoil in the world’s largest water tunnel, the US Navy’s William B. Morgan Large Cavitation Channel (LCC). The goal of these experiments is to provide a unique high Reynolds number experimental dataset at chord-based Reynolds numbers (Re) approaching those of full-scale propulsors (~108). This data will be used for validation of scaling laws and computational models, with particular emphasis given to the unsteady, separated, turbulent flow at the trailing edge. In addition, these experiments will provide fundamental insight into the fluid mechanics of trailing-edge noise generation in marine propulsion systems. This paper describes the experimental equipment and methods employed in the test program. Described herein is the use of the LCC’s Laser Doppler Velocimetry (LDV) capability to acquire flow velocity mean and turbulence quantities, as well as estimates of boundary layer transition. Also presented is a Particle Imaging Velocimetry (PIV) system developed for these experiments and employing seed injection upstream of the channel’s flow straightener. Finally, a description is given of instrumentation mounted in the foil for measurement of vibration and surface static and dynamic pressures.
其他 2008-02-20
气体,液体,流体中PLIF,激光诱导荧光,浓度场,混合度,速出场检测方案(流量计)
For the enhancement of many technical processes like reacting flows, mixing in chemical reactors or mixture formation in combustion engines the knowledge of spatial distribution of species is of great importance. The planar laser-induced fluorescence (PLIF) technique is a well established method to get 2-dimensional maps of concentration or mixture-ratio in a specific plane in the volume of interest. In our recent work we were able to validate a PLIF technique for the quantitative detection of fuel/air ratios (FARLIF) which will be used for mixture-formation investigations in optical engines [1, 2]. In many applications – like mixture-formation in combustion engines – not only the actual species or mixture distribution is of interest. The temporal evolution, the dynamics of the species distribution is often a key for the understanding and improvement of the fluid-dynamic processes.
其他 2008-04-20
空气流体,蝙蝠飞行中速度矢量场检测方案(粒子图像测速)
给出了蝙蝠飞行的实验测量结果。包括直线和回转飞行时的运动特性高帧频记录，以及蝙蝠飞行方向后部尾流漩涡的测量。
其他 2008-02-05

圆柱尾迹,湍流,三维相干结构中3D3C速度矢量场,速度场,体视速度场,层析速度场检测方案(粒子图像测速)
The wake of a circular cylinder at Re = 2700 is investigated by means of Tomographic PIV (Tomo-PIV), a recently developed three-dimensional velocimetry technique. The paper presents the principles of Tomo-PIV and discusses in details the implementation of the technique to the experimental conditions. With a measurement volume of approximately 40x40x10 mm2 two configurations are chosen in order to describe both the 2D wake features and the span wise organization of secondary rollers dominating the 3D flow organization. The present data allow to directly evaluate the measurement error imposing mass conservation inside the volume (viz. solenoidal velocity field). The visualization of the wake instantaneous structure is obtained by means of vorticity vector magnitude iso-surfaces, or decomposing the vorticity in the span wise and stream-wise(normal)/bi-normal component, which return the separate contribution of the Kármán rollers and the interconnecting structures between them respectively. The properties of the secondary rollers are given in terms of span wise wavelength, peak vorticity, vorticity stretching and their size and shape. A value of the span wise wavelength λ z/D = 1.2 is recurring and the rollers organization into pairs is found to be similar to the instability Mode B occurring in lower Reynolds number wakes investigated with previous studies.
其他 2008-06-14
流体中速度场,速度矢量场检测方案(粒子图像测速)
Lifting surfaces are used both for propulsion and control of sea vessels and must meet performance criteria such as lift, drag, and (in some military applications)hydroacoustic noise limits. Design tools suitable to predict such criteria must handle complex flow phenomena and manage the wide range of flow scales inherent in marine applications (Reynolds numbers ~108). To date, the development of such tools has been limited by the lack of controlled experimental data in this high Reynolds numbers range. Lifting surface flow is the focus of current high Reynolds number experiments involving a two-dimensional hydrofoil in the world’s largest water tunnel, the US Navy’s William B. Morgan Large Cavitation Channel (LCC). The goal of these experiments is to provide a unique high Reynolds number experimental dataset at chord-based Reynolds numbers (Re) approaching those of full-scale propulsors (~108). This data will be used for validation of scaling laws and computational models, with particular emphasis given to the unsteady, separated, turbulent flow at the trailing edge. In addition, these experiments will provide fundamental insight into the fluid mechanics of trailing-edge noise generation in marine propulsion systems. This paper describes the experimental equipment and methods employed in the test program. Described herein is the use of the LCC’s Laser Doppler Velocimetry (LDV) capability to acquire flow velocity mean and turbulence quantities, as well as estimates of boundary layer transition. Also presented is a Particle Imaging Velocimetry (PIV) system developed for these experiments and employing seed injection upstream of the channel’s flow straightener. Finally, a description is given of instrumentation mounted in the foil for measurement of vibration and surface static and dynamic pressures.
其他 2008-02-20
气体,液体,流体中PLIF,激光诱导荧光,浓度场,混合度,速出场检测方案(流量计)
For the enhancement of many technical processes like reacting flows, mixing in chemical reactors or mixture formation in combustion engines the knowledge of spatial distribution of species is of great importance. The planar laser-induced fluorescence (PLIF) technique is a well established method to get 2-dimensional maps of concentration or mixture-ratio in a specific plane in the volume of interest. In our recent work we were able to validate a PLIF technique for the quantitative detection of fuel/air ratios (FARLIF) which will be used for mixture-formation investigations in optical engines [1, 2]. In many applications – like mixture-formation in combustion engines – not only the actual species or mixture distribution is of interest. The temporal evolution, the dynamics of the species distribution is often a key for the understanding and improvement of the fluid-dynamic processes.
其他 2008-04-20
空气流体,蝙蝠飞行中速度矢量场检测方案(粒子图像测速)
给出了蝙蝠飞行的实验测量结果。包括直线和回转飞行时的运动特性高帧频记录，以及蝙蝠飞行方向后部尾流漩涡的测量。
其他 2008-02-05

人工膜肺中速度场检测方案(CCD相机)
采用laVision公司的DaVis6.2图像采集和处理软件平台，FlowMaster-S相机，以及Solo III型 15Hz Nd-YAG PIV 激光器。构成了一套粒子成像测速系统，并利用该系统测量了新研制的人工膜肺内的空气流场。
医疗/卫生 2019-08-19
离体心脏充注测试系统中速度矢量场检测方案(粒子图像测速)
采用德国LaVision公司的DaVis8.1.4版本数字图像采集和处理软件平台，构成粒子成像测速（PIV)系统，对在离体心脏充注测试系统中调节顺应性对流体流动的影响进行了研究。
医疗/卫生 2019-08-19
生物假体瓣膜中三维流动结构检测方案(CCD相机)
采用LaVision公司的两台八百万像素CCD相机，加让两块平面反射镜，构成一套等效四个视角的层析PIV测量系统并对在主动脉根的体外模型中经过生物假体瓣膜的三维流动结构进行了测量研究。
医疗/卫生 2019-08-05
轴流血液泵中内部流场速度场检测方案(CCD相机)
采用英国Litron公司的LDY300激光器和LaVison的ImagerProSX 5M型跨帧相机，构成一粒子成像测速系统。对轴流血液泵的内部流场的速度场进行了实验测量和分析研究。
医疗/卫生 2019-01-14

溪红点鲑、背鳍、臀鳍中水动力学功能,流场,速度场,速度矢量场检测方案(粒子图像测速)
Recent kinematic and hydrodynamic studies on fish median fins have shown that dorsal fins actively produce jets with large lateral forces. Because of the location of dorsal fins above the fish’s rolling axis, these lateral forces, if unchecked, would cause fish to roll. In this paper we examine the hydrodynamics of trout anal fin function and hypothesize that anal fins, located below the fish’s rolling axis, produce similar jets to the dorsal fin and help balance rolling torques during swimming. We simultaneously quantify the wake generated by dorsal and anal fins in brook trout by swimming fish in two horizontal light sheets filmed by two synchronized high speed cameras during steady swimming and manoeuvring. Six major conclusions emerge from these experiments.
生物产业 2008-06-15
藤壶幼虫中游动附着过程和水流场检测方案(CCD相机)
采用英国Litron公司的30毫焦双脉冲PIV激光器，LaVision Imager Pro X PIV相机。在LaVision的硬件控制和数据采集软件平台DaVis集成控制下。对水中藤壶幼虫的游动附着过程进行了观测研究。
生物产业 2017-02-09
鲨鱼中自由游动的水动力学推动机制检测方案(粒子图像测速)
Two-dimensional velocity fields around a freely swimming freshwater black shark fish in longitudinal (XZ) plane and transverse (YZ) plane are measured using digital particle image velocimetry (DPIV). By transferring momentum to the fluid, fishes generate thrust. Thrust is generated not only by its caudal fin, but also using pectoral and anal fins, the contribution of which depends on the fish’s morphology and swimming movements. These fins also act as roll and pitch stabilizers for the swimming fish. In this paper, studies are performed on the flow induced by fins of freely swimming undulatory carangiform swimming fish (freshwater black shark, L = 26 cm) by an experimental hydrodynamic approach based on quantitative flow visualization technique. We used 2D PIV to visualize water flow pattern in the wake of the caudal, pectoral and anal fins of swimming fish at a speed of 0.5–1.5 times of body length per second. The kinematic analysis and pressure distribution of carangiform fish are presented here. The fish body and fin undulations create circular flow patterns (vortices) that travel along with the body waves and change the flow around its tail to increase the swimming efficiency. The wake of different fins of the swimming fish consists of two counterrotating vortices about the mean path of fish motion. These wakes resemble like reverse von Karman vortex street which is nothing but a thrust-producing wake. The velocity vectors around a C-start (a straight swimming fish bends into C-shape) maneuvering fish are also discussed in this paper. Studying flows around flapping fins will contribute to design of bioinspired propulsors for marine vehicles.
生物产业 2016-10-17

空气流场、喷射过程中流场、冲击激波、横向喷射、腔体相互作用检测方案(CCD相机)
采用LaVision公司的粒子成像测速系统，对冲击激波碰撞影响下的横向喷射-腔体相互作用进行了研究。测试系统包括一台200毫焦的双脉冲激光器和IagerProX型CCD相机。
航空航天 2017-07-19
跨音速涡轮叶栅尾流中速度场PIV检测方案(CCD相机)
采用德国LaVision的Imager Pro X4M CCD相机和蔡司ZEISS 50mm f/2 Makro 镜头，测量了亚音速高马赫数跨音速涡轮叶栅尾流的2D2C速度矢量场并和五孔探针的测量结果进行了对比分析。
航空航天 2019-08-05

浅水流动表面中速度场检测方案(粒子图像测速)
本文介绍了浅水流动表面的大尺度PIV测量方法，详细介绍了实验设备和不用激光照明进行PIV测量的技术途径。特别研究了在表面流动分析时示踪粒子的选择和播撒方法。
环保 2008-02-05