Fluid dynamics

Development of cooling system for aerodynamic throat nozzle

  • Developed a construct for effective cooling of heated surfaces of aerodynamic nozzles
  • Determined the parameters of the cooling system (nozzle wall temperature, liquid temperature, pressure loss in the bulk of the liquid, water consumption)
  • Device has been manufactured and is being successfully used


Assessment of properties of shell-and-tube heat exchanger

  • Calculated coefficients ∆T and ∆P (heat emission and heat transfer, respectively) for various configurations of shell-and-tube heat exchangers and for various fluids
  • Determined gradation of parameters based on length
  • Adjusted the calculation methods that were built into the design software suite for heat exchangers



Calculations for double screen transpirational cooling method of hot gas circuits

  • Determined the parameters of the cooling gas supply (consumption rate, pressure drop, flow rate) for various modes of external hot flow for the target levels of the permissible wall temperature


Study of mixing chamber of high-enthalpy heater

  • Studied various methods of supplying cold gas
  • Determined the optimal configuration allowing for the most uniform outflow


Flow within pebble-bed of recuperative heat exchanger

  • Studied the heating process of the pebble-bed of the recuperative heat exchanger
  • Close-up of the simulation of the porous material
  • Studied the viability of several methods of hot flow supply
  • Selected the viable options, completed the design project, created the device



Flow and heat exchange in pebble-bed of recuperative heat exchanger 

  • Studied the heating process of the pebble-bed of the recuperative heat exchanger
  • Detailed model, accounting for the shape and arrangement of the pebble-bed
  • Determined the relation between heating speed, time and distance
  • Adjusted the parameters for the one-dimensional calculation model



Modification of volute chamber of exhaust and noise suppression pipe of gas pumping unit

  • Studied the viability of several volute chamber configurations 
  • Calculated the pressure drop for each option
  • Determined the most viable configurations
  • Modified the original configuration, achieved correspondence (within 5% range) with the experimental results 
  • Increased fuel conservation by 3-4% by reducing the resistance within the duct, which—given the unit's useful life being measured in years—is going to generate a lot of value over time



Decay of low-frequency pressure oscillations in waveguide sensors of meters

  • Studies of pressure distribution in high-altitude engines during ground testing are done using waveguides: long pipes that connect the pressure sensors with the flow path
  • Studies analyze decay of low-frequency low-amplitude pressure oscillations with the base pressure level being 0.2….5 atm
  • Data from the tests is compared with the theoretical calculations of pressure loss in waveguides
  • Analytical method is adjusted for low-pressure states, high temperature states, and high-frequency states