Preliminary design and performance analysis of a positive displacement hydraulic turbine

29th IAHR Symposium on Hydraulic Machinery and Systems

Sonawat, Arihant^1^2 ; Kim, Seung-Jun^1^2 ; Choi, Young-Seok^1^2 ; Lee, Kyoung-Yong^2 ; Kim, Kyung Min^3 ; Lee, Yong-Kab^4 ; Kim, Jin-Hyuk^1^2

Advanced Energy and Technology, University of Science and Technology, Daejeon

34113, Korea, Republic of^1

Thermal and Fluid System RandD Group, Korea Institute of Industrial Technology, Cheonan

31056, Korea, Republic of^2

Frontier Research and Training Institute, Korea District Heating Corporation, Gyeonggi-do

17099, Korea, Republic of^3

Anflux Co., Ltd., Seoul

08378, Korea, Republic of^4

关键词: Computational Fluid Dynamics codes;    Fundamental principles;    Governing equations;    Initial design;    Operational range;    Performance analysis;    Positive displacement;    Preliminary design;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/240/2/022009/pdf
DOI  :  10.1088/1755-1315/240/2/022009

来源: IOP

【 摘 要 】

Positive displacement turbines (PDT) find their use in applications with low flowrate, high head and having lower specific speed requirement, which is below the operational range of the conventional turbines. In the present work, an initial PDT was designed using the governing equations of fluid flow to extract the unused energy from the hot water transportation pipelines. The turbine was of lobe type with two rotors each having four lobes. The tip clearance, side clearance and other leakage losses were considered while designing using fundamental principles coupled with the empirical co-relations from the literature. The initial design's performance analysis had been carried out numerically using commercial computational fluid dynamics (CFD) code ANSYS CFX. The objective of the present study was to reveal the performance of the preliminary design for the given conditions and examine the causes of pulsations in torque, pressure and flow rate from the fluid flow characteristics.