Gas volume estimation in a vertical pipe flow considering the bubble size obtained from an ultrasonic velocity vector profiler
Gas volume estimation in a vertical pipe flow considering the bubble size obtained from an ultrasonic velocity vector profiler
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考虑从超声波速度矢量轮廓仪获得的气泡尺寸来估计垂直管流中的气体体积
DOI：
10.1007/s00348-022-03474-x
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发表时间：
2022
影响因子：
2.4
通讯作者：
Murai Yuichi
中科院分区：
文献类型：
--
作者：
Park Hyun Jin;Yoon Dongik;Akasaka Shintaro;Tasaka Yuji;Murai Yuichi
传统的超声速度剖面仪(UVP)由一个发射器和一个接收器组成，测量的速度分量为单一的声束方向，不能准确测量气液两相管流中上升气泡的三维运动。在UVP测量中，速度的微小增加或减小都会导致气泡大小的较大误差。该误差会影响气体体积的估计，因为气体体积测量使用从UVP获得的气泡大小信息。为了测量安装在管道外壁上的UVP上的气泡上升速度，UVP至少应该提供二维速度矢量分量。为了解决这些问题，我们采用了一种由一个发射器和两个接收器组成的矢量UVP。我们的UVP在现有的方法上进行了测试，该方法使用水箱中上升的气泡来估计气泡大小。该方法首先利用气液界面产生的高回波强度检测气泡表面。然后，通过平均表面上升速度和气泡表面形状来估计气泡的大小。与光学可视化方法相比，我们的方法只提供了1%的低估速度和12%的高估大小。最后，我们尝试用垂直管测量上升气泡中的气体体积，并确认测量误差约为30%。
A traditional ultrasonic velocity profiler (UVP) containing one emitter and receiver measures a single velocity component, which is laid on the ultrasonic beam direction; therefore, it cannot exact the motion of rising bubbles moving three-dimensionally in a gas–liquid two-phase pipe flow. In the UVP measurement, a small increase or decrease in the velocity causes a large error in the bubble size. This error affects the gas-volume estimation because the gas-volume measurement uses information on the bubble size obtained from the UVP. To measure the rising velocity of bubbles from a UVP installed on the outside wall of the pipe, the UVP should provide two-dimensional velocity vector components at least. To address these issues, we adopted a vector-UVP composed of one emitter and two receivers. Our UVP was tested on the existing method for the bubble size estimation using rising bubbles in a water tank. In the method, first, the bubble surface is detected using high echo intensities caused by gas–liquid surface. Then, the size of bubbles was estimated from averaging the rising velocity of the surface and the shape of the bubble surface. It is confirmed that our method provided just 1% underestimated velocity and 12% overestimated size compared with that of the optical visualization. Finally, we tried to estimate the gas-volume measurements in the rising bubbles using a vertical pipe and confirmed that the measurement error is approximately 30%.Graphical abstract
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DOI：
10.1016/j.ijmultiphaseflow.2004.07.002
发表时间：
2004-10
影响因子：
3.8
作者：
A. Kitagawa;K. Sugiyama;Y. Murai
通讯作者：
A. Kitagawa;K. Sugiyama;Y. Murai
影响因子：
2.2
作者：
Murai, Yuichi;Tasaka, Yuji;Roberto Gonzalez A, S.
通讯作者：
Roberto Gonzalez A, S.
通过时间分辨双激光测量研究水平湍流气泡通道流中单空脉冲的空间发展
影响因子：
3.8
作者：
Park Hyun Jin;Tasaka Yuji;Murai Yuichi
通讯作者：
Murai Yuichi
影响因子：
3.2
作者：
H. Park;Daichi Saito;Y. Tasaka;Y. Murai
通讯作者：
H. Park;Daichi Saito;Y. Tasaka;Y. Murai
影响因子：
2.4
作者：
Murai, Yuichi;Ohta, Shoko;Takeda, Yasushi
通讯作者：
Takeda, Yasushi