Aerospace Technic and Technology

It is investigated one of the directions of increasing the technical, economic and environmental characteristics of engines and power plants by air cleaning as a working fluid of condensed moisture. Prospective methods of aerosol medium separation with the help of gradient intensification of transfer processes in boundary layers of multifunctional surfaces are also investigated. Multifunctional surfaces include surfaces with a coefficient of compactness more than 2000 m2/m3, characterized by improved heat exchange and separating properties. A characteristic feature of the developed separating profiles is the combination of a waveform part with flat input and output elements. In the assembly, the separating profiles form the curved channels with a number of successive confuser and diffuser elements. In diffusor elements, there are separating zones with the gas reverse flow. The liquid film resulting from the droplets deposition, falling into these zones, is influenced by the vortices effect that counteracts the film motion in the direction of the main flow and facilitates its flow under the action of gravity. 

The investigations of gas dynamics and deposition coefficients of the separation profile were performed. The coefficient of droplets deposition for flow rates of 5, 10, 15, 20 m/s in separating profiles with a radius of 5, 10, 15, 20, 25 mm was calculated. It was determined that vortex zones provide full removal of captured water from the smooth surface profile up to the airspeed of 5 m/s. Excess of this speed leads to the removal of part of the water from the vortex zones. Drainage elements are provided for preventing secondary flooding of the flow in flat sections of the separation profile. Design solutions and a generalized scheme of the ship system of air cleaning of condensed moisture for the air flow from 20 to 2000 m3/h were developed. The introduction of filters based on gradient technologies will increase the reliability, the life of the marine power equipment and its elements. This will contribute to the creation of high-efficiency energy-saving technologies and efficient design solutions for a wide range of gradient marine power plant separators.

cleaning system; separator; aerosol medium; deposition coefficient; flow rate

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Hall, D. E. King, D. B., Morgan, T. B. et al. A review of recent literature investigating of the measurement of automotive particulate; the relationship with environment aerosol, air quality and health effect. Ibid, 1998, no. 982602, pp. 53-65.

Ryzhkov, S. S. Primenenie aerozolnyh gradientnyh tehnologiy v separacionnom oborudovanii dlja sudostroyeniya i morskoy infrastruktury [Use of aerosol gradient technologies in separation equipment for shipbuilding and marine infrastructure]. Sudostroyeniye i morskaya infrastruktura – Shipbuilding & Marine Infrastructure, 2015, no. 2(4), pp. 151–163.