4 results about "Liquid velocity" patented technology

The invention relates to the technical field of computer aided design, in particular to a cold chain refrigeration system parameter design optimization system which comprises the steps of extracting temperature difference, flow velocity and pressure offset characteristics, recognizing abnormal point locations and determining regulation and control sections, calculating change rate overlapping areas to form a sorting map and a matching device response deviation obtaining and updating component. And outputting a structure combination verification result to form an optimized arrangement diagram group. According to the method, high-frequency offset characteristics of temperature difference, flow velocity and pressure sudden change are extracted, abnormal points are recognized through synchronous trend comparison, a sequencing map is output through coincidence measurement and calculation of liquid velocity slope, temperature drop gradient and load change, action stepping reasonability is evaluated according to throttling response deviation, device recognition and structure regulation and control verification are completed, and device recognition and structure regulation and control verification are completed. Accurate positioning and structure optimization of response mismatching sections are achieved, and the regulation and control efficiency and operation stability of the system under multi-parameter coupling are improved.

This invention provides a numerical simulation method and system for cavitation turbulence based on gas-liquid slip velocity correction, belonging to the field of cavitation numerical simulation technology. It obtains the gas phase volume fraction distribution and liquid phase velocity field distribution in a fluid pipe, establishes the density gradient field of the gas-liquid interface region, constructs a dynamic characteristic function of the gas-liquid interface including a coupled expression of interface curvature and local vorticity terms, and uses an adaptive gas-liquid slip velocity correction model to correct the relative gas-liquid velocities, solving for the turbulent characteristic parameters and pressure field distribution in the cavitation flow field. This significantly improves the accuracy and refinement of the gas-liquid interface dynamics description, enhances the adaptability of the slip velocity correction model to the nonlinear characteristics of the interface, and helps to more accurately simulate cavitation turbulence behavior, thereby improving the accuracy and reliability of cavitation turbulence numerical simulation and providing more scientific and effective technical support for cavitation prediction and control in complex engineering fields.

The invention discloses a sealing compensation and intelligent cooling system of a zero-leakage chemical process pump, and particularly relates to the technical field of chemical process pumps, which comprises a chemical process pump system starting module, an intelligent control module, a temperature detection and liquid speed control module, a temperature monitoring and judging module and a continuous monitoring and dynamic adjusting module, before the temperature monitoring and judging module transmits a monitoring result to the continuous monitoring and dynamic adjusting module, a temperature abnormity judging link, a shutdown preparation module, a temperature monitoring and shutdown confirmation module and a system closing module are arranged; a cooling adjusting algorithm based on the fuzzy PID control principle is adopted in the system, and the flow speed of cooling liquid can be adjusted in real time according to the actual temperature change of a pump body; compared with a traditional fixed flow cooling mode, the algorithm can control the cooling effect more accurately, energy waste caused by overcooling is avoided, meanwhile, it is ensured that the temperature of the pump body is always within the safety range, the cooling efficiency is improved, and the operation cost is reduced.

The present application belongs to the technical field of oil and gas exploitation, and relates to a gas-liquid two-phase flow reverse iteration production profile interpretation method, system, device and medium. According to the wellbore inner diameter PC value, fluid velocity profile correction coefficient and production value of the production layer, the wellbore fluid apparent velocity calculation value is obtained, and the wellbore fluid average velocity value is obtained according to the wellbore fluid apparent velocity calculation value. The wellbore fluid holdup calculation value is obtained according to the difference between the gas velocity and the liquid velocity. The gas production value of the current layer of the production layer is obtained according to the difference between the gas velocity and the liquid velocity, the wellbore fluid average velocity value and the wellbore fluid holdup calculation value. By judging whether the difference between the gas production value of the current layer of the production layer and the production value of the production layer is within the threshold range, the iteration of the gas production value of the current layer of the production layer and the acquisition of the gas production value of the next layer of the production layer are carried out, and the present application is beneficial to the accurate interpretation of the gas-liquid two-phase flow production logging of the ultra-deep well.