Тенденции развития науки и образования Заключение. Анализ несимметричных режимов работы электрических сетей с тяговой нагрузкой показал нарушение требований, регламентированных ГОСТом 32144-2013. Случаи несимметрии напряжения наиболее распространены и значительны по величине в летний период, а в зимний период нессиметрия практически соответствует требованиям ГОСТа. Одной из причин этого можно считать высокий грузопоток в летний период. Из этого можно сделать вывод, что при реализации Распоряжения Правительства [3] произойдет увеличение несимметрии как по количеству случаев, так и по амплитуде. К мерам по снижению несимметрии можно отнести применение симметрирующих трансформаторов, уменьшение сопротивлений трансформаторов, фазных и нулевых проводов нулевой последовательности, а также использование устройств уравнивания мощности [4]. *** Панченко В.А. 1,2 , Чирский С.П. 3 Визуализация теплового состояния фотоприѐмника с турбулизаторами потока теплоносителя 1 Российский университет транспорта МИИТ 2 Федеральный научный агроинженерный центр ВИМ
Due to a simple design and hydraulic passage that is the least susceptible to clogging, torque flow pumps (TFP) of Turo type are the most common pumps used for pumping various hydraulic mixtures. These pumps are referred to vortex pumps, operation of which is accompanied by energy loss and vortex formation resulting in low economic efficiency. Since the TFP is a vortex hydraulic machine, the ratio of the fluid velocity in the free pump passage to the impeller rotational speed ωfluid /ω is an indicator of the TFP efficiency. The higher the value of ωfluid , the more efficient the pump is. The mechanism of the energy transfer in the TFP is caused by both blade and vortex operating process, or a combined operating process. The efficiency of the pump can be improved by increasing the portion of blade operating process. The aim of the study is to improve the efficiency of the TFP of Turo type by modifying the impeller design, to obtain a basic equation of the TFP with a new impeller which has several extended blades, and to study the influence of the impeller geometry on the pump performance experimentally. The study was carried out by analytical and experimental methods. The equation describing the head dependence on the hydraulic passage dimensions of the pump with a new impeller was obtained analytically. This equation can be used to clarify the methodological recommendations for designing the pump. The energy balance in the TFP was analyzed. During the testing on a test rig, the characteristics of the pump were obtained, which confirmed the advantages of using the modified impeller with extended blades resulting in increase of the portion of the blade operating process.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.