Abstract
Low-cost and high-efficiency circulating water channels are widely used in the hydrodynamic tests of an underwater device. The current research mainly focuses on obtaining a better velocity uniformity of the test section by optimizing the curve function of the boundary in the contraction section. While, for small underwater device, their hydrodynamic characteristics are sensitive to turbulence. Thus, the circulating water channel, which can obtain the required turbulence characteristics, is urgently needed. A small circulating water channel, which can reduce the turbulence intensity based on a porous grid plate and can be used to test the hydrodynamic characteristics of a small underwater device, is designed. The relationships between porosities and resistance coefficients of a porous grid plate are established. The effects of the honeycomb (porosity and thickness); screen (porosity, number of layers, and spacing); and pumping flow rate on the turbulent characteristics of the test section are studied. The relationships between the parameters and the turbulent characteristics of the test section are established, and the methods to achieve the required flow characteristics of the test section are proposed. Experiments are carried out, and the validity of the obtained results is verified. In this work, the turbulence intensity of the fluid field in the test section can be restrained to 0.0491, which is enough to meet the turbulence requirements for the hydrodynamic test of a small underwater device. This work can provide references for the construction of a hydrodynamic test platform for small underwater devices.
Highlights
IntroductionA circulating water channel is one of the important equipments used in hydrodynamic studies [1,2]
A circulating water channel is one of the important equipments used in hydrodynamic studies [1,2].The power system, such as the pump, is usually used to drive the water circulation in the water channel, and the tested device is generally positioned in the test section of the channel
Compared with other underwater test systems, the circulating water channel has the advantages of low cost, high efficiency, and quick response
Summary
A circulating water channel is one of the important equipments used in hydrodynamic studies [1,2]. In order to obtain the required turbulence characteristics of the test section, parameter optimization studies of the honeycomb and screen should be carried out. In order to meet the requirements of low turbulence intensity in the test section for a small underwater device, which is sensitive to turbulence, systematic studies on the turbulence reduction of a small circulating water channel based on the honeycomb and screens should be carried out. A small open circulating water channel is designed, and the performance of combining the honeycomb with the screens to reduce the turbulence in the test section is studied. Based on the obtained results, the methods to obtain the required fluid field characteristics of the test section were proposed, and a circulating water tunnel was established for the experiments. Experiments were carried out to verify the obtained theoretical results and proposed methods
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
