Temat: laser Doppler anemometry - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Wykorzystanie anemometrii laserowej w pomiarze strumienia płynu
The utilization of LDA in flow measurement
Autorzy:: Zator, S.
Powiązania:: https://bibliotekanauki.pl/articles/153266.pdf
Data publikacji:: 2006
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: pomiar strumienia
laserowa anemometria
flow measurement
laser Doppler anemometry
Opis:: W artykule przedstawiono podstawy anemometrii laserowej. Podano możliwości i ograniczenia różnych konstrukcji układów optycznych. Artykuł zwraca uwagę na specyfikę analizatorów widma stosowanych w anemometrii. Podano możliwą do uzyskania niepewność pomiaru prędkości cieczy i gazów w kanałach zamkniętych.
The paper presented of basics of laser Doppler anemometry. They are describes possibility and limits various constructions of optical systems. Article is to pay attention to specify of spectrum analyzers used in anemometry. They are given uncertainty of velocity measurement of liquid and gases in closed conduct possibly to achieve.
Źródło:: Pomiary Automatyka Kontrola; 2006, R. 52, nr 10, 10; 63-65
0032-4140
Pojawia się w:: Pomiary Automatyka Kontrola
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Measurement of flow parameters in a Taylor-Couette configuration using UDV measurement technology
Autorzy:: Meironke, Heiko
Klembt, Daniel
Powiązania:: https://bibliotekanauki.pl/articles/95311.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: ultrasonic doppler velocimetry
laser doppler anemometry
Taylor-Couette flow
welocymetria dopplerowska
anemometria laserowa dopplerowska
przepływ Taylora-Couette'a
Opis:: In the context of the investigations of multiphase flows, e.g. in cooperation with the local brewery, the convective transport phenomena during the fermentation are investigated. Due to the strong turbidity of the medium, the measurement of velocity profiles is complicated. The difficulties of an investigation with a biological fermentation fluid are the many complex interactions between the different three phases (solid, gas, liquid). Furthermore, natural convection processes are superimposed by rising gas bubbles and the high turbidity of the fluid only allow an acoustic velocity measurement. This leads to high requirements for the measurement technology and the following evaluation. In previous investigation, ultrasonic transducers are used for the non-contact determination of velocity fields in fluids. The results of these past projects show that the measurement signals of the ultrasonic transducers used can be influenced by many factors. In order to verify the results of the transducers and to investigate the existing uncertainties, a flow configuration with a relatively stable reproducible flow pattern is required. In this study, a calibration system for ultrasonic transducers is developed, manufactured and validated by means of optical measurement technology such as the LDA. The experimental setup in this study produces a constantly reproducible Taylor Couette fluid flow. Geoffrey I. Taylor observed in 1923 that at a certain Reynolds number regular ring vortices are superimposed on the base flow. Along the axis, these vortices occur at the same distance, but with an alternating sense of rotation. Finally, a measurement using Ultrasonic Doppler Velocimetry in a model fluid will be compared with an optical measurement technique.
Źródło:: Journal of Mechanical and Energy Engineering; 2019, 3, 3; 259-266
2544-0780
2544-1671
Pojawia się w:: Journal of Mechanical and Energy Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Pumping capacity of pitched blade multi – stage impellers
Autorzy:: Jirout, T.
Powiązania:: https://bibliotekanauki.pl/articles/185756.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: pitched blade impeller
multi-stage impeller
impeller pumping capacity
velocity
profile
laser Doppler anemometry
wirnik wielostopniowy
wydajność pompowania wirnika
prędkość
profil
laser Dopplera
Opis:: This paper extends knowledge about flow in an agitated batch with pitched blade multi-stage impellers. Effects of various geometrical parameters (blade number, distance between impellers) of pitched blade multi-stage impellers on pumping ability have been investigated. Axial velocity profiles were measured by LDA (Laser Doppler Anemometry). Axial pumping capacities were obtained by integration of measured axial velocity profiles in outflow from impellers. Main attention was focused on the effect of the distance between impellers in multi-stage configurations, on their pumping capacity and flow in the mixing bath in comparison with an independently operating pitched blade impeller with the same geometry. In case of a relatively close distance between Impellers H3/d= 0.5 - 0.75, the multi-stage impeller creates only one circulation loop and the impellers itself behave identically as pumps in series. However for relative higher distance of impellers than H3/d= 1.25, the multi-stage impeller creates two separated circulation loops.
Źródło:: Chemical and Process Engineering; 2014, 35, 1; 47-53
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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