Localizing multiple targets with a single particle velocity sensor

2018 ◽  
Vol 144 (3) ◽  
pp. 1854-1854
Author(s):  
Tung-Duong Tran-Luu ◽  
Minh Dao
Author(s):  
Zhezheng Zhu ◽  
Lingmeng Yang ◽  
Wenhan Chang ◽  
Chengchen Gao ◽  
Yilong Hao ◽  
...  

2019 ◽  
Vol 55 (4) ◽  
pp. 201-202 ◽  
Author(s):  
Zhe Li ◽  
Wenhan Chang ◽  
Chengchen Gao ◽  
Yilong Hao

Author(s):  
Tomomi Uchiyama

This paper is concerned with the numerical simulation of the particulate jet generated by solid particles falling from a slit orifice into an unbounded quiescent air. A two-dimensional vortex method, proposed for the analysis of particle-laden free turbulent flow in prior papers, is employed for the simulation. The falling particles induce complicated airflow involving eddies with a wide variety of scales. The air takes its maximum velocity at the jet centerline. The particle velocity is higher than the free falling velocity of a single particle. The effects of the diameter and density of the particle on the flow are investigated. The entrained airflow rate is favorably compared with the value predicted by an analytical model.


2020 ◽  
Author(s):  
Zhu Linhui ◽  
Shen Jienan ◽  
Zeng Yibo ◽  
Guo Hang

Abstract Particle velocity sensor (PVS) plays an important role in determining the type and location of a sound source. In this presentation, analytical model of heat transfer in PVS with a three-wire (SHS) configuration was first presented. By comparing with the thermal diffusion motion, the forced convection exerts a smaller influence on the temperature distribution. Thus, variation in forced convection could induce the formation of a thermal perturbation field. The overall temperature distribution model of a PVS is made up of a steady temperature field and a thermal perturbation field. With the derived model, PVS with SHS configuration has smaller thermal noise and higher signal-to-noise ratio in comparision with a two-wire (SS) configuration under the same conditions. Optimized parameters of structure design and heating power could be obtained via the analysis model. Also, this model gives optimal output performance and frequency-dependent characteristic curve. Numerical results are found to be in good agreement with the analytical solutions and experimental data, which verify the correctness of analytical model and numerical method. The study provides a basis for a theoretical and numerical analysis.


2017 ◽  
Vol 103 (2) ◽  
pp. 252-261 ◽  
Author(s):  
Jochen Metzger ◽  
Manfred Kaltenbacher

Author(s):  
O. Pjetri ◽  
R. J. Wiegerink ◽  
T. S. J. Lammerink ◽  
G. J. M. Krijnen

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