A témavezető neve:
Aszódi Attila - tanszéke: Institute of Nuclear Techniques - beosztása: Full Professor - tudományos fokozata: Dr. habil, PhD - email címe: aszodi@reak.bme.hu |
A doktori munka készítésénak helye és címe: Institute of Nuclear Techniques 1111 Budapest, Műegyetem rkp. 9. |
A kidolgozandó feladat címe: Experimental investigation of fluid flow in VVER-1200 rod bundle geometries |
A téma rövid leírása, a megoldandó legfontosabb feladatok felsorolása: Particle Image Velocimetry (PIV) is a state-of-the-art non-intrusive optical flow measurement method based on the recording images of the movement of flow-following particles added to the liquid in the investigated flow domain. PIV is in use at BME Institute of Nuclear Techniques (NTI) since 2007, and has been applied for such investigations as coolant mixing, heat transfer of the fuel rod of the training Reactor or thermal-hydraulics characteristics of the MSFR molten salt reactor concept core. With the application of Matched Index of Refraction (MIR) method it is possible to investigate the flow field in complex geometries. By matching the refractive indices of the model material and the working fluid the flow domain behind a solid model part becomes visible for the optical method, thus allowing the measurement in geometries such as rod bundles. Most of the publications in the international literature focus on rectangular lattice geometries as these are common for fuel rod bundles applied in western pressurized water reactors (PWRs). However in case of VVER reactors and some Generation IV reactor types hexagonal lattice is applied. So far only a limited number of publications presented PIV measurement results on hexagonal lattice rod bundle PIV measurements. Main purpose of the work proposed here is to develop an appropriate experimental model of hexagonal fuel rod bundles that can be applied with PIV for VVER-1200 relevant geometries. The measurement data would lead to a deeper understanding of flow behavior in such geometries, and would be invaluable for validating computational models and simulation results like CFD or subchannel code calculations. Such an experimental model would be a new, state-of-the-art and unique facility even in terms of international comparison. One of the objectives of the PhD research is to deliver new CFD-grade experimental data, which would be applicable for the validation of CFD codes and models. The research work could contribute to the development and optimization of spacer girds with mixing vanes for pressurized water reactors. Further task of the PhD candidate is to enhance the evaluation methods and tools used for PIV measurement data processing. The PhD candidate would perform the following tasks:
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Nyilatkozat: A fenti munkahelyen a javasolt témában kutatás feltételei biztosítottak, a téma meghirdetését a munkahelyi vezető jóváhagyta. |
Budapesti Műszaki és Gazdaságtudományi Egyetem Természettudományi Kar |
1111 Budapest, Műegyetem rakpart 3. K épület I. em. 18. www.ttk.bme.hu |