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Main objectives of Laboratory of Numerical Modeling (LNM) are R&D provision with a computation test and work performance in the field of engineering and computation of hydrodynamics, acoustics and heat exchange. Efficiency is achieved by three-dimensional geometry processing computerization of real hydraulic systems and such routine operations as calculation grid generation, boundary condition setting and visualization of computational results.
Basic trends of Laboratory operations:

CFD Modeling
Unsteady 2D gas-liquid flows with account of phase and film interaction
Pressure variation along the nozzle wall accelrating water-and-air flow (the flow passes from left to right)

Spray density (kg(m2s) -1) by gas-droplet jet radius at the nozzle exit


Comparison of droplet jet boundary obtained in numerical experiment with photographing results

Unsteady turbulent 3D single-phase flows including instability, turbulence and conjugated heat exchange
Mach number distribution in multi-nozzle steam ejector

Water monitor passage updating by secondary flow parameters at the nozzle exit cross-section

3D two-phase flows
Room fire extinguishing modeling. Water drop concentration and temperature fields
Room fire extinguishing modeling. Water drop size is 100 mcm. Velocity and temperature fields
Fire in a room 2x3 meter modeling. Fields of free convection velocity and temperature


video: "Room Fire Extinguishment"
Room Fire Extinguishment Modeling view download
(7,53 Mb)

Noise and pseudo-sound oscillation modeling of pumps, fans, turbines and other blade units
This approach gives a possibility to construct an efficient and more accurate calculation technique in comparison to typical CFD-CAA methods. Design and experimental pressure pulse amplitude distribution of the first blade passing frequency harmonic in a centrifugal ventilator. A version of an acoustical-and-turbulent method for three-dimensional calculations may be used for axial and diagonal pump and ventilator, water jet, lawn mower, and wind turbine design.Grass particle concentration in a lawn mower deck.Mown grass particle concentration in lawn mower deck.
Centrifugal fan pressure pulsation computation and measurement
In-plane rotor pseudosound field (a) and acoustic field at the ground (b) and around a lwn mower (c)
Unsteady pressure field in a high speed centrifugal pump


Different directions of Laboratory work represented by particular examples:

1. Interior three-dimensional single-phase flows including instability, turbulence and conjugated heat exchange simulation

2. Interior heterogeneous flows. A mathematical model of a dense aerosol flow allowing to predict gas and droplet parameters was developed at the Laboratory. The account of boundary condition variations allows the numerical modeling accuracy increase. Numerical simulations give a liquid distribution in gas-liquid fire fighting system monitors. For a backpack fire fighting unit allowed to numerically define basic oscillation frequencies of a nozzle-effluxing liquid film, determine main performance parameters of the units effecting the extinguishing liquid jet features.

3. Vortex method of pressure pulse and noise computation in subsonic flow turbo-machines. A method of numerical pressure pulse and noise simulation in blade machines was developed at the Laboratory based on representation of unsteady compressible media motion in the form of a vector sum of a turbulent mode (pseudo-sound) and an acoustical mode. This approach gives a possibility to construct an efficient and more accurate calculation technique in comparison to typical CFD-CAA methods of computing. This method is applied for pressure pulse and noise computation in pumps, ventilators, lawn mowers and wind turbines.
  Basic trends of Laboratory operations:
Interior three-dimensional single-phase flows including instability, turbulence and conjugated heat exchange simulation.
Interior heterogeneous flows
Acoustical-and-turbulent method of pressure and noise pulse calculation in subsonic flow turbo-machines

Sale of Technologies:
Assignment of patents valid in the territory of the country, design documentation and processing equipment transfer
Sale of Licenses:
Conclusion of license agreements for a certain time period, design documentation transfer
Joint Ventures:
Establishment of joint ventures holding the right to advanced technologies
Sale of Products:
Sale of products via a dealer's network

 
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