Uniform theory of movers on continuous flows. Brief theory of counter-rotating propellers

Authors

  • Борис Шамшадович Мамедов Zaporizhzhya National Technical University, st. Zhukovsky, 64, Zaporozhye, Ukraine, 69063, Ukraine

DOI:

https://doi.org/10.15587/1729-4061.2013.16681

Keywords:

kinematic analysis, counter-rotating propellers, blown profile thrust capacity, lifting capacity

Abstract

The developed brief theory of the counter-rotating propellers is a logical chain of a series of articles relating to the development of the theory of one-row propellers, brief theory of counter-rotating propellers, brief theory of concurrent-rotating propellers, a comparative analysis of one-row, counter-rotating and concurrentrotating propellers in order to select the most effective variant. It is shown that counter-rotating propellers have high energy consumption and very low flight (traction) EF (efficiency factor), 35% and 7.5% respectively on the first and second rotor wheels. Therefore, the ultimate goal of a series of articles will be: to show and prove that among the one-row, counter-rotating and concurrent-rotating propellers the latter are the most efficient, as they allow to completely eliminate the main drawback of one-row and counter-rotating propellers associated with the kinematic zone of rigid (elastic) impact, Figure 1, section B1-B1, generating powerful impact waves in an oscillatory mode into environment. Another drawback of the counter-rotating propellers is the flow swirling after the first rotor wheel, regulating the counter flow swirling at the entry of the second counter-rotating rotor wheel, which in turn regulates the higher hydrodynamic load of the blades edges of the second counter-rotating rotor wheel and low speed compared to the first. Hence, the next article will cover the creation of the brief theory of concurrent-rotating propellers, which contains their full analysis

Author Biography

Борис Шамшадович Мамедов, Zaporizhzhya National Technical University, st. Zhukovsky, 64, Zaporozhye, Ukraine, 69063

Ph.D., Associate Professor

References

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Published

2013-07-30

How to Cite

Мамедов, Б. Ш. (2013). Uniform theory of movers on continuous flows. Brief theory of counter-rotating propellers. Eastern-European Journal of Enterprise Technologies, 4(7(64), 20–28. https://doi.org/10.15587/1729-4061.2013.16681

Issue

Vol. 4 No. 7(64) (2013): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2014 Борис Шамшадович Мамедов

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