Single theory of movers. Calculation the formulas of thrust, flying (thrust) efficiency of rocket engines
DOI:
https://doi.org/10.15587/1729-4061.2013.9388Keywords:
the thrust of rocket engines, flying (thrust) efficiency.Abstract
The drawbacks of modern theory of rocket engines which are connected with mistaken fundamental formulas of thrust and flying (thrust) efficiency calculated by Academician B.S.Stechkin in 1929 year are considered.Calculated on the kinematical foundation analise fundamental formulas of thrust of rocket engines (8), (9) and flying (thrust) efficiency (11), (12) are fully correspond to experimental part of modern theory of air-jet engines and gives principal new direction of technical mentality on thrust process generation with all movers on continuous flows gives very simple possibility to understand and explain any physical processes which takes place when rocket engine working, give possibility to simplify essentially calculation methods of rocket engines by means of introduction of exact data on P*Hcp, F*Hcp (cross-section Г-Г) PсFс (cross-section C-C) which are calculated according to given thrust of rocket engine. It is established that the thrust of any movers on the continuous flows including rocket engine fully depends on speed flight and is calculated with single formulas of thrust and flying (thrust) efficiency (8), (9). Lavaly nozzles which are used in rocket engines have very large area Fc at the outlet cross-section C-C that lowers the thrust and efficiency of rocket engines for the reason of very high force resistance PCFC. For thrust increasing of rocket engines it is necessary to use narrow outlet nozzles positioned in zone of excces expansion of gas flow providing minimum value of PCFC.
References
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- Мамедов, Б.Ш. Основы единой теории движителей на непрерывных потоках. Вывод формулы тяги, полетного (тягового) КПД турбореактивных двигателей [Текст] / Б.Ш.Мамедов / Восточно-Европейский журнал передовых технологий, – 2011. - № 4/7(52). - С.15–20
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