Куліков, Олександр АндрійовичКуликов, Александр АндреевичKulikov, Oleksandr AndriiovychРатушний, Олександр ВалерійовичРатушный, Александр ВалерьевичRatushnyi, Oleksandr ValeriiovychMoloshnyi, O.Івченко, Олександр ВолодимировичИвченко, Александр ВладимировичIvchenko, Oleksandr VolodymyrovychПавленко, Іван ВолодимировичПавленко, Иван ВладимировичPavlenko, Ivan Volodymyrovych2022-06-242022-06-242022Kulikov O., Ratushnyi O., Moloshnyi O. (2022). Impact of the closed, semi-opened, and combined contra-rotating stages on volume loss characteristics. Journal of Engineering Sciences, Vol. 9(1), pp. D6-D13, doi: 10.21272/jes.2022.9(1).d20000-0002-4274-76930000-0001-7222-87660000-0002-3525-09530000-0002-6136-1040https://essuir.sumdu.edu.ua/handle/123456789/88077The article is devoted to studying the contra-rotating stages with different impellers and blade discs. Determining the reduction of volumetric losses by modeling the contra-rotating stages in the software package ANSYS CFX. The work aimed to create and study the flow and characteristics: semi-open, closed impellers, and blade discs. As a result of the work, the following contra-rotating stages were determined and compared: the semiopened impeller with the semi-opened blade disc; the closed impeller with the closed blade disc; the semi-opened impeller with the closed blade disc; the closed impeller with the semi-opened blade disc. As a result of research, fluid flows in contra-rotating stages and their characteristics in the form of pressure and efficiency were obtained. According to the obtained data, the expediency of using contra-rotating stages as a working body of the pump is written.enccby4pumpenergy efficiencysemi-opened impellersemi-opened blade discArticle