Method and device for synchronous testing of fluid flowing and solid motion information based on PIV and PTV technologies

Abstract

The invention relates to the field of non-contact flow field measurement in experimental fluid mechanics, in particular to a method and device for synchronous testing of fluid flowing and solid motioninformation based on PIV and PTV technologies. On the basis of coupling of the particle image velocimetry (PIV) technology and particle tracking velocimetry (PTV) technology, a tracer particle with the minimum scale is used for replacing and marking a fluid mass point in a liquid flow field; a boundary of solid and liquid intersection is marked by a rhodamine reagent; a high-speed camera is usedfor recording a motion track of the marked fluid mass point and a motion track of a marked object boundary under irradiation of laser with the wavelength of 532nm, so that the flowing information of aflow field and motion information of an object are obtained simultaneously in one test. Therefore, a data measuring error between repeated testing is avoided; and the test workload and cost are reduced.

Description

technical field [0001] The invention relates to the field of non-contact flow field measurement in experimental fluid mechanics, in particular to a method and device for synchronous testing of fluid flow and solid motion information based on PIV and PTV technologies. Background technique [0002] The existence of complex unsteady flow such as turbulent flow and eddy current in fluid mechanics makes the single-point measurement of traditional flow display technology unable to meet people's needs for fluid flow cognition. This requires new measurement technology to realize the development of flow display from single-point measurement to multi-point, plane to space, steady-state to transient, and single-phase to multi-phase (Sheng Senzhi, Xu Yueting, Yuan Huijing. The development of flow measurement technology in the past ten years New Development [J]. Mechanics and Practice, 2002,24(5):1-14.). In the 1980s, Particle Image Velocimetry (PIV) technology realized point-to-surface...

AI Technical Summary

Problems solved by technology

However, people are more and more eager to obtain the interaction mechanism between fluid and solid and to observe new flow phenomena. At present, when conducting test experiments, PIV technology is usually used to measure the flow field information first, and then repeated tests are performed using speedometers or The image observation method observes the motion information of the solid. This method can obtain both the flow information of the flow field and the motion information of the object, but the two experiments are carried out independently, with a certain degree of uncertainty, and in this way Operation will double the experimental workload (Shams A, Jalalisendi M, Porfiri M. Experiments on the water entry of asymmetric wedges using particle image velocimetry[J]. Physics of Fluids, 2015, 27(2): 060803-612.)

Images