The Division of Hydromachines and Fluid Mechanics at the Institute of Turbomachinery,
Technical University of Lodz, headed by Adam
Papierski, DSc, PhD, conducts research within governmental projects and in cooperation with industry, as well as provides courses for daily, extramural, postgraduate and PhD studies.
The research projects are focused on measurements of local parameters and the flow structure to verify the calculations results obtained with the commercial version of the ANSYS CFX software package and to improve 3D numerical methods for flow computations in hydraulic passages of blade systems, as well as to solve problems related to optimization and modernizations of hydraulic machines and systems that operate in various branches of industry.
In the design works and modernizations of pump hydraulic systems for the industrial applications, the following design methods developed at our Institute have been employed:
- to achieve the required shape of the flow characteristics,
- to obtain the unloaded characteristics of the power consumption curve,
- to satisfy special performance demands employing the numerical analysis of 3D flows.
The tests are conducted in the Laboratory of Hydraulic Machines with the area equal to 306 m2, equipped with a tank of the 30 m3 volume connected with a deep-well tank, whose volume is 53 m3 equipped with an installations that allows for an exchange of water between those tanks at its simultaneous cooling, and a well tank with the diameter 0.75 m and the depth 14 m.
The Laboratory has its own 2MW power supply at the 6kV voltage or 365kW at the 400V voltage.
Experimental tests are conducted on test stands to examine pumps with a horizontal axis, driven by:
- an electric motor suspended in the cradle of the power 25kW with stepless control of revolutions in the range 0-10 000 rpm,
- an electric motor of the power 75 kW and 2950 rpm suspended in the cradle,
- an electric motor of 150 kW and 1450 rpm suspended in the cradle and supplied by a converter,
and a test stand with a vertical axis, with a motor of 40 kW and 2950 rpm, also suspended in the cradle.
Each test stand is equipped with a measurement head in the form of hydraulic passages with the adequate measurement apparatus.
There are the following test stands in the Laboratory of Hydraulic Machines, namely:
- to measure a pressure distribution in the impeller chamber of the centrifugal pump, equipped with an electric motor of 1.5 kW and 2950 rpm,
- to visualize the medium flow in the water jet of the submersible pump with the power of the electric motor of 4.5 kW and 2950 rpm,
- to test mechanical sealings in the submersible pump of the power of 1.1kW and 2950 rpm, equipped with an oil chamber that separates the water area of the pump from the electric motor,
- to investigate a structure of the flow in semi-opened impellers of pumps of a low flow rate and the electric motor power 25 kW and stepless control of revolutions in the range of 0-10 000 rpm; the measurements apparatus allows for measuring local and unsteady flow parameters,
The Laboratory has also a test stand for model tests of inlet chambers that was built within the cooperation with ALSTOM Power to test inflow conditions of cooling water in pumps in the 460MW unit at Pątnów II Power Station.
The above-mentioned test stands are also used during classes with students, as well as 12 test stands that belong to the Laboratory of Fluid Mechanics where fundamental problems and phenomena in fluids mechanics, especially fluid dynamics, are explored.
The advantageous results of design, testing and modernization works have resulted in the implementation of numerous types and sizes of pumps into production and operation.
The results of research activities have been presented in more than 100 unpublished reports and several dozens of papers published in Polish and foreign journals.
Staff members of the Division of Hydropumps and Fluid Mechanics:
Adam Papierski, DSc, PhD.
Krzysztof Sobczak, PhD,
Michał Kulak, PhD
Tomasz Wajman, PhD