Velocity measurements in a supersonic wind tunnel with a novel calibration-free seedless velocimetry utilizing laser-induced shockwaves and a double-line probe system

Byun, Hosung; Bae, Jiyeol; Yoon, Taekeun; Yang, Inyoung; Lee, Sanghoon; Carter, Campbell D.; Do, Hyungrok

doi:10.1016/j.ijheatmasstransfer.2021.122246

Cited by 3 publications

(2 citation statements)

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“…Combined with Equation ( 7), the actual time interval between the arrival of the shock wave at the array sensor can be obtained as in Equation (10). (10) ∆t 12 represents the reading error of the time interval when the shock wave passes over sensors 1 and 2, while ∆t 13 represents the reading error of the time interval when the shock wave passes over sensors 1 and 3.…”

Section: Simulationmentioning

confidence: 99%

“…Predicting, assessing, protecting against, and treating blast-related injuries require accurate data on shock wave pressure; therefore, precise measurement of shock wave pressure values is crucial. Currently, the predominant test methods for effectively acquiring the shock wave pressure parameters include the impact target method, the pressure sensor method, the velocimetry method, and so forth [ 6 , 7 , 8 , 9 , 10 , 11 ]. Although the effect target method is more intuitive, it cannot accurately obtain the shock wave overpressure value [ 12 , 13 ]; however, due to the complex and harsh conditions at the explosion test site, direct pressure sensor measurements are susceptible to additional interferences that may distort the effective signal.…”

Section: Introductionmentioning

confidence: 99%

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Research on the Shock Wave Overpressure Peak Measurement Method Based on Equilateral Ternary Array

Zhang,

Peng,

Lin

et al. 2024

Sensors

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The measurement process of ground shock wave overpressure is influenced by complex field conditions, leading to notable errors in peak measurements. This study introduces a novel pressure measurement model that utilizes the Rankine−Hugoniot relation and an equilateral ternary array. The research delves into examining the influence of three key parameters (array size, shock wave incidence angle, and velocity) on the precision of pressure measurement through detailed simulations. The accuracy is compared with that of a dual-sensor array under the same conditions. Static explosion tests were conducted using bare charges of 0.3 kg and 3 kg TNT to verify the numerical simulation results. The findings indicate that the equilateral ternary array shock wave pressure measurement method demonstrates a strong anti-interference capability. It effectively reduces the peak overpressure error measured directly by the shock wave pressure sensor from 17.73% to 1.25% in the test environment. Furthermore, this method allows for velocity-based measurement of shock wave overpressure peaks in all propagation direction, with a maximum measurement error of 3.59% for shock wave overpressure peaks ≤ 9.08 MPa.

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Section: Simulationmentioning

confidence: 99%