An optical study of high-pressure water-jet dynamics

Znamenskaya, I. A.; Nersesyan, D. A.; Sysoev, N. N.; Koroteeva, E. Yu.; Shirshov, Ya. N.

doi:10.3103/s0027134916040184

Cited by 5 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Znamenskaya et al [15] presented optical tests of the dynamic performance of a high-pressure water and sewage system. The article discusses the results of visual tests of streams of fast-flowing fluids ejected from a nozzle at a pressure of 400 MPa.…”

Section: Overview Of High-speed Camera Applicationsmentioning

confidence: 99%

Experimental Research on Foil Vibrations in a Gas Foil Bearing Carried Out Using an Ultra-High-Speed Camera

2021

View full text Add to dashboard Cite

The foil bearing consists of parts made of very thin, properly shaped foils. Usually, it is very difficult or even impossible to measure the vibrations of these elements during the bearing operation using traditional sensors. Therefore, the authors of this article have proposed an entirely new approach to this issue. This article discusses the analysis of vibrations of the structural supporting layer of a gas foil bearing at high rotational speeds. Instead of using a traditional method to measure the bearing journal movement, the measurement was performed using an ultra-high-speed digital camera. This type of measurement was used for the first time to analyse foil bearing displacement. It turned out that doing so can give a far more vibrant picture of what is happening in gas foil bearings during their operation. The article includes an analysis of foil vibrations. This phenomenon has already been analysed numerically, and this is the first time it has been analysed experimentally. The registered motion of the foils can be compared with the results obtained from numerical models, thus allowing their further development. One such comparison is shown in this article.

show abstract

Section: Overview Of High-speed Camera Applicationsmentioning

confidence: 99%

Experimental Research on Foil Vibrations in a Gas Foil Bearing Carried Out Using an Ultra-High-Speed Camera

2021

View full text Add to dashboard Cite

show abstract

“…Vision-based methods are becoming crucial in the non-contact measurement of displacement and velocities of engineering structures [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. However, the use of special high-speed imaging technology is necessary if the dynamic response contains high frequencies, which cameras cannot correctly capture with standard frame rates.…”

Section: Introductionmentioning

confidence: 99%

“…The ultra-high-speed imaging setup applied in the research consisted of a Shimadzu HPV-2 with a frame rate equal to 1,000,000 fps equipped with a long-distance microscope lens. Znamenskaya et al [ 10 ] discussed the test results of fast-flowing fluids stream ejected from a nozzle at high pressure. The research was aimed at biphasic flow investigation for the water treatment industry.…”

Section: Introductionmentioning

confidence: 99%

Indirect Measurement of Loading Forces with High-Speed Camera

Mendrok

Dworakowski

Dziedziech

et al. 2021

Sensors

View full text Add to dashboard Cite

In the last few decades, there has been a significant increase in interest in developing, constructing, and using structural health monitoring (SHM) systems. The classic monitoring system should, by definition, have, in addition to the diagnostic module, a module responsible for monitoring loads. These loads can be measured with piezoelectric force sensors or indirectly with strain gauges such as resistance strain gauges or FBG sensors. However, this is not always feasible due to how the force is applied or because sensors cannot be mounted. Therefore, methods for identifying excitation forces based on response measurements are often used. This approach is usually cheaper and easier to implement from the measurement side. However, in this approach, it is necessary to use a network of response sensors, whose installation and wiring can cause technological difficulties and modify the results for slender constructions. Moreover, many load identification methods require the use of multiple sensors to identify a single force history. Increasing the number of sensors recording responses improves the numerical conditioning of the method. The proposed article presents the use of contactless measurements carried out with the help of a high-speed camera to identify the forces exiting the object.

show abstract

“…Область применения высокоскоростных камер в настоящее время чрезвычайно широка и включает изучение быстропротекающих процессов (сварки [1], взрывов и ударов [2]), изучение движения потока частиц в струе жидкости [3] и плазмы [4] и даже в медицине, например, при диагностике различных голосовых расстройств [5]. В текущий момент продолжается ее проникновение и во многие другие сферы науки и техники, например, в область испытаний стрелкового оружия, где традиционно применяются другие методы измерений [6][7][8][9][10][11][12].…”

Section: Introductionunclassified

Research of the Possibility of Creating a Measuring System Based on a Modern Smartphone for Estimating the Parameters of Object Movement

Porsev

Vdovin

Markov

et al. 2021

Intellekt. Sist. Proizv.

View full text Add to dashboard Cite

When studying different fast-moving processes, high-speed video recording is now widely used. The main deterrent for its further distribution remains the high cost of the necessary equipment. Herewith modern mobile devices (including smartphones) are constantly improved, some models are supplied with video cameras with high recording speed - 1000 frames/s and higher. In the paper the possibility of creating a measuring system based on one of the modern smartphone models to analyze the parameters of object motion is studied. The block diagram of the system is given; a layout of such a system has been created. To verify the workability of the developed model of the system, a software and hardware facility was developed to imitate the motion of an object on the Arduino Uno platform with an engine and a carriage moving along the guides. Graphs of changing the coordinates and speed of the object obtained using the program Tracker 5.1.5 are shown. A theoretical estimate of the error in determining the speed of an object using the implemented model of the system is performed. In addition, the estimation of the range of object speeds that can be measured using the developed system, as well as the range of permissible object movements was performed. The results of the performed experiments prove the possibility of creating a measuring system on the basis of the considered model of the smartphone to assess the speed of moving small objects with certain limitations. At the same time, to create a full-fledged measuring system that does not require additional processing of the received resulting video image on a PC and is capable of calculating the necessary results immediately after the end of the measurement process, it is necessary to develop our own software, which is advisable to do using the existing free libraries.

show abstract

An optical study of high-pressure water-jet dynamics

Cited by 5 publications

References 4 publications

Experimental Research on Foil Vibrations in a Gas Foil Bearing Carried Out Using an Ultra-High-Speed Camera

Experimental Research on Foil Vibrations in a Gas Foil Bearing Carried Out Using an Ultra-High-Speed Camera

Indirect Measurement of Loading Forces with High-Speed Camera

Research of the Possibility of Creating a Measuring System Based on a Modern Smartphone for Estimating the Parameters of Object Movement

Contact Info

Product

Resources

About