The ExHFT-11 conference, co-hosted by North China Electric Power University, Xi'an Jiaotong University, and the Institute of Engineering Thermophysics of the Chinese Academy of Sciences, concluded successfully in Beijing on the 18th. The conference focused on research topics such as "multiphase flow," "combustion dynamics," and "supercritical fluid thermodynamics."
Revealer exhibited scientific instruments and equipment, including Ultrahigh Speed Cameras and particle image PIV measurement systems, and demonstrated typical applications in related research areas to participating experts and scholars.
Bubble dynamics is a core issue in heat transfer. It requires quantifying the spatiotemporal evolution of bubble generation, growth, and collapse, as well as the interaction mechanisms between bubbles and the surrounding fluid and solid boundaries. Using the Revealer M Pro series High Speed Camera, the bubble motion can be continuously captured at 1080P @ 3200fps, accurately capturing subtle bubble morphology and boundary changes, providing high-quality image data for subsequent bubble analysis. Using Revealer bubble measurement software, based on the sequence images obtained by the high-speed camera, image processing algorithms (such as threshold segmentation, edge detection, fitting, etc.) are used to track, identify and analyze bubbles, accurately measure the size of bubbles such as Sauter diameter, position, velocity and acceleration and other parameters, and conduct in-depth research on the dynamic characteristics of bubbles.
Flame propagation in combustion dynamics primarily focuses on the flame propagation velocity and propagation mode (laminar and turbulent flame propagation) within a combustible mixture, the structure and stability of the flame front, and various factors influencing flame propagation (gas composition, pressure, temperature, flow state, etc.). The Revealer S1315M High Speed Camera, with a 10,000-frame-class large memory, can capture the morphological changes, propagation velocity, and flow structure of the flame front at a frame rate of 1280×1024 at 15,000 fps. In combination with a schlieren camera, based on the principle of optical refraction, it can convert density gradient variations in the flow field around the flame into visible schlieren images, revealing flow phenomena such as flame-induced vortices and compression waves, helping researchers understand the physical mechanisms of flame propagation.
When a supercritical fluid is near its critical point, its physical properties undergo dramatic changes, potentially exhibiting fluctuations in density and refractive index parameters similar to those of the gas and liquid phases. Studying isosurfaces and vortex structures in gas-liquid two-phase flow fields facilitates understanding the velocity distribution, vortex formation, and development mechanisms in gas-liquid two-phase flows, helping to optimize equipment design and improve heat and mass transfer efficiency. The Revealer Particle Image Velocimetry (PIV) system introduces tracer particles into the gas-liquid two-phase flow field and captures particle motion using a high-speed camera. Through image processing and cross-correlation algorithms, the velocity vector field in the flow field is obtained. Furthermore, PIV software employs vortex identification algorithms to further analyze vortex core structure, vortex location, size, intensity, and vortex evolution.
The Revealer High Speed Camera and particle image velocimetry (PIV) system acquires experimental data with high temporal and spatial resolution, providing indispensable experimental tools for multi-scale, multi-physics field coupling research in heat transfer and thermodynamics. At the same time, the HF Agile Device Co.,Ltd PIV Fluid Measurement and Analysis Key Laboratory provides free research-grade wind and water tunnel experiment sharing platforms and customized PIV technology solutions for clients in the fields of heat transfer and thermodynamics. For more product and technical information, please contact us ↓↓↓
