Turbulent jets have been always present in fluid-mechanic researches due to the
large number of applications they have and to the presence of all the turbulence features
on them. Thanks to the use of relative new non-intrusive techniques–such as PIV
(Particle Image Velocimetry)-, the knowledge of turbulence in general, and turbulent
jets in particular has increased.
This work is focused on the assessment of both, the main characteristics of the
turbulent jet and, at the same time, some significant PIV features. For that aim two
experiments are proposed:
-The first one, denominated “Spatial Resolution in PIV”, tries to determine the
best position to place the digital camera that films the movement of the particles
present in the jet, taking into account that we are interested on studying not only
the microscales of the turbulent flow, but also the velocity field and the
recovering of isotropy by evaluating the turbulent parameters (skewness,
kurtosis, square mean derivative ratios,…).
-In the second one, called “Effect of the Reynolds Number in Turbulence”,
starting from the results of the first experiment, the behavior of the jet depending
on the relationship between the inertia forces and the viscous ones is analyzed.
To do this, three different zones along the jet and eight different Reynolds
numbers are to be studied.
This report is structured in four different chapters. The first one corresponds to a
theoretical introduction to turbulence. In the second one the experimental setup is
described after introducing the PIV measurement technique. The third one presents the
results and carries out a deep analysis of them. Finally, in chapter four, the results are
summarized obtaining some important conclusions and considering as well future
challenges of the present work.
北京欧兰科技发展有限公司为您提供《流体中速度矢量场检测方案(粒子图像测速)》,该方案主要用于其他中速度矢量场检测,参考标准--,《流体中速度矢量场检测方案(粒子图像测速)》用到的仪器有德国LaVision PIV/PLIF粒子成像测速场仪、时间分辨粒子成像测速系统(TR-PIV)、Imager sCMOS PIV相机