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Visualisation research of the flow processes in the outlet chamber–outlet bridge–inlet chamber zone of the gear pumps

Stryczek J., Antoniak P., Jakhno O., Kostyuk D., Kryuchkov A., Belov G., Rodionov L.

Archives of Civil and Mechanical Engineering

2015

Vol. 15, no. 1

95--108

This paper is a presentation of the theoretical analysis and visual experimental investigation on flow processes in the inlet chamber, outlet bridge and inlet chamber of the gear pump, commonly known as the trapped volume. In order to achieve that, the size and location of the considered chambers and bridge were determined, and next, the theoretical analysis was carried out. In order to verify the theoretical consideration, an experimental gear pump with transparent (plexi) bodies was designed and built. The pump was tested on a dedicated test stand. The visualisation research conducted for different values of the operational parameters (inlet pressure, temperature, rotational speed) proved the previously carried out theoretical analysis to be correct and, simultaneously, showed that there are areas in the gear pump where the flow processes are seriously disturbed. In order to eliminate the disadvantageous phenomena and processes observed in the pump, a new type of relief grooves was added to the design of the considered area (the solution was developed originally by the authors of this paper), which was consequently theoretically and experimentally examined. The results of both types of the research proved definitely that the application of the relief grooves resulted in a considerable reduction of the negative phenomena and processes in the considered area of the gear pump.

Zastosowanie RFID w analizie niezgodności inwentaryzacyjnych w przemyśle samochodowym: rozpoznanie warunków i ograniczeń technologicznych

Houé T., Guimaraes R.

Zeszyty Naukowe. Logistyka i Transport / Międzynarodowa Wyższa Szkoła Logistyki i Transportu we Wrocławiu

2009

Vol. 8, No. 1

93-103

Celem niniejszego artykułu jest przedstawienie uwarunkowań i ograniczeń implementacji technologii RFIDw sercu logistyki, czyli przepływach wewnętrznych, u liczącego się w przemyśle samochodowym dostawcy. Artykuł stara się uzasadnić, że wspomniana technologia może mieć znaczący wpływ na poprawę jakości przeprowadzanych analiz inwentaryzacyjnych, tymczasem jej wdrożenie i upowszechnienie nie jest pozbawione trudności, jakie należy pokonać, w szczególności jeśli chodzi o przemysł samochodowy. Na podstawie analizy konkretnego przykładu artykuł zawiera propozycje, które mogą albo ułatwić wdrożenie RFID, albo umożliwić integrację tego rozwiązania z już istniejącym systemem zarządzania logistycznego przedsiębiorstwem.

The aim of this article is to present conditionings and restrictions of RFIDtechnology implementation in the heart of logistics that is internal flow, in important supplier in the car industry. The article tries to justify, that the mentioned technology may have a significant influence on the improvement of the quality of stock-taking analysis, however its implementation and dissemination implicates problems that have to be overcame especially in the car industry. On the basis of the analysis of the specific example the article contains propositions that may either facilitate RFIDimplementation or enable to integrate the solution with the already existing system of logistics management of the enterprise.

Transonic flows, shock wave-turbulent boundary layer interaction

Doerffer P., Kaczyński J.

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

1998

Vol. 2, No 2

271-286

Shock wave-boundary layer interaction is one of the most important phenomenon in transonic flows. Due to its complexity it is difficult as well for experimental as for numerical study. The growing potential of CFD is therefore of great importance. Different aspects of shock wave-boundary layer interaction should be studied in different flow configurations. Therefore results concerning profile flow, helicopter rotor at hovering and forward flight and internal flows are presented in this paper. These are to illustrate our ability in CFD in general. Besides flow simulation the development of codes is carried out.