Experimental studies of electric field impact on chemical composition of kerosene-air mixture products combustion

Аuthors

Kolodyazhnyi D. Y.¹, Nagornyi V. S.^2*

1. United shipbuilding Corporation, 90, Marata str., St. Petersburg, 191119, Russia
2. Peter the Great Saint-Petersburg Polytechnic University, 29, Polytechnicheskaya str., St. Petersburg, 195251, Russia

*e-mail: nagorny.vladim@yandex.ru

Abstract

The efficiency enhancement of aircraft engines through quality improvement of fuel spraying and fuel-air mixture combustion is the question of the day. The results of experimental studies of properly induced electric field, using electrical facility affecting aviation kerosene (EFAK) at the fuel nozzle input, as well as chemical composition of kerosene-air mixture combustion gases were obtained.

Based on the carried out analysis it is possible to draw the following inferences:

• cascade connection of the EFAK flow part with the fuel nozzle without supplying voltage to EFAK electrodes changes relative mass content share of the corresponding chemical element of combustion gases at all exhaust points. Moreover, depending on the type of a chemical element and exhaust point, these changes can either decrease, or increase in relation to the results of previous measurements;

• on EFAK electrodes energizing the content of С_хН_y, CO, CO₂, H₂ in combustion gases changes significantly compared to Х_uо. Moreover, depending on exhaust point these changes can bear the signs of + or — Thus, for the point of probing of combustion gases placed at 20mm from the left edge of the horizontal cross section diameter of combustion gases flow the decrease of C_xH_y content by 22.191%, CO by 17.5367% and CO₂ by 9.53% with simultaneous increase of H₂ content by 3.7313% occurs. For the probing points at 60 and 100 mm from the left edge of the combustion gases flow cross-section the increase of С_хН_y content by 10.5263 % and 8.3832 % correspondingly takes place. The content of CO₂ increases by 6.5638% and 2.8604%, while the content of CO increased by 14.927% and 3.9484% correspondingly. Moreover, the content of H₂ decreases at these probing points by 3.7313 and 0.7692% correspondingly;

• such non-unique changes of chemical elements content at these three probing points in the course of applying voltage to EFAK electrodes can be explained by possible non-uniformity kerosene TC-1 drops flow distribution over the sections during combustion in the combustion chamber.

Keywords:

aircraft engine, kerosene-air mixtures, combustion, electric field, test bench, combustion chamber, combustion gas, fuel nozzle, laser-optical measurements

References

Didenko A.A., Biryuk V.V., Lukachev S.V., Matveev S.G. Lazerno-opticheskie metody diagnostiki protsessov goreniya (Laser-optical diagnostic methods of combustion process), Samara, Izdatelstvo Samarskogo gosudarstvennogo aerokosmicheskogo universiteta, 2006, 187 p.