With the increasing requirements for engine matching and the continuous expansion of application fields, the frequency of special working conditions is becoming higher and higher, thus the requirements for cooling water pump technology are also constantly increasing. How to continuously improve the efficiency of the engine cooling water pump, expand its operating range, and ensure its reliability under space constraints, high temperatures, and variable speed conditions is a key issue that urgently needs to be studied and solved.
1) Research on the Internal Flow Mechanism of Engine Cooling Water Pump. The unique and distinctive structural characteristics of the engine cooling water pump, as well as the unique internal flow channel type and the rotational motion of the impeller, make the internal flow field of the pump body exceptionally complex. The formation mechanism, mathematical description method, and interaction between flow field and structure of the internal flow field of the engine cooling water pump are not yet fully understood. As a validation and supplement to numerical calculation methods, PIV measurement explores the true flow patterns inside engine cooling water pumps and establishes modern design methods for engine cooling water pumps, which is an important direction for future research.
2) Research on cavitation mechanism of engine cooling water pump. Due to the high working water temperature, its complex thermodynamic properties have a significant impact on cavitation performance, and the mechanism of its occurrence is difficult to grasp; At the same time, the overall structural dimensions are limited and the operating conditions vary greatly. The process of cavitation initiation, development, collapse, and damage is full of uncertain factors, especially the cavitation conditions under non design conditions are difficult to predict and solve. Therefore, mastering the cavitation mechanism under the thermodynamic effects of engine cooling water pumps, exploring the hazards of cavitation induced pressure pulsation, and further improving the performance and reliability of engine cooling water pumps are important contents that require more in-depth and systematic research.
3) Research on standardized, intelligent and controllable electric water pumps. With the improvement of design methods, the modular and standardized development of bearing systems, water seal systems, and impeller systems will greatly shorten the design cycle, reduce production costs, and improve the universality of components. At the same time, achieving real-time control of the engine cooling water pump and adapting to changes in working conditions through variable frequency speed regulation, replacing traditional mechanical water pumps with electric water pumps will be the development trend of engine cooling water pumps.
