8 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.

A system, method, and apparatus for liquid flow sensing and measurement with real-time, dynamic, fluid-configurable computing portion as a software-defined sensor system (SDSS). One embodiment detachably partitions liquid flow meter into a sensing portion and a computing portion, each of the two portions having their own memory. Information directly related to physical and operational properties of the sensing portion, i.e., calibration, is stored locally in memory of sensing portion, and accessible by the computing portion. Configuration information for computing portion in particular applications of the flow meter, e.g., fluid characteristics for viscosity calculation, is stored locally in computing portion memory. Dividing information into two memories allows sensing portion and computing portion of a flowmeter to be replaceable at their subcomponent level with a standard or single stock unit sensing portion calibrated to a standard condition and a single stock unit computing portion configurable to a plurality of fluid types and operating temperatures without additional calibration.

The present application relates to the technical field of fluid mechanics, and discloses an analysis method for a T-shaped gas-liquid two-phase pipeline pressure pulsation attenuator, which comprises the following steps: S1: establishing a T-shaped gas-liquid two-phase pipeline geometric model and a corresponding calculation model; S2: performing geometric model verification, analyzing the flow pattern and flow field characteristics of the T-shaped gas-liquid two-phase pipeline flow by respectively changing the gas-liquid velocity and the gas phase inflow; S3: simulating the high-frequency noise response of the pressure generated by the T-shaped gas-liquid two-phase pipeline; S4: simulating H-shaped attenuators of various sizes, and comparatively analyzing the attenuation effect of a specific pressure frequency band under different sizes of the resonant cavity; and S5: obtaining the physical structure parameters of the attenuator for better attenuating the pressure pulsation of the T-shaped gas-liquid two-phase pipeline flow by comparatively analyzing the attenuation effects of different specifications of the H-shaped attenuator. The present application considers various influencing factors of the pipeline flow characteristics in the T-shaped gas-liquid two-phase pipeline, simulates the pipeline flow in a real scene, and analyzes the H-shaped attenuator with a better attenuation effect.

The invention provides a high-pressure gas well wellbore liquid holdup calculation method, which comprises the following steps of: based on a drift flux model, introducing a dimensionless phase apparent velocity in a Farude similar quasi form to carry out pressure scaling; and the change rule of the liquid holdup along with the apparent velocity of the dimensionless phase is accurately represented through fitting of normal-pressure experimental test data in a wide gas-liquid velocity range, so that an effective method suitable for calculating the liquid holdup of the shaft of the high-pressure gas well is formed. According to the method, the key parameter is the multiplication coefficient of the dimensionless gas phase apparent velocity, and the distribution rule of gas-liquid two-phase flow in a wide liquid velocity range can be accurately captured, so that the method does not need complex drift parameter implicit calculation and gas-liquid two-phase flow pattern judgment on the basis of ensuring the high-low pressure pipe flow calculation precision, and the calculation accuracy of the high-low pressure pipe flow is improved. The method is simple in form and convenient to operate, provides a convenient and efficient gas well shaft liquid holdup prediction means for field operators and engineering technicians in the field of oil and gas field development, and has potential popularization and application value.

This invention discloses an intelligent electromagnetic flowmeter, belonging to the field of flowmeter technology. It includes a metering mechanism for reading liquid flow rate, an exhaust mechanism for discharging gas, and an output mechanism for controlling the output flow rate. The exhaust mechanism of this invention can discharge gas entering the liquid in the inlet pipe, ensuring that no extra air is present during liquid transport. When the inlet pipe is full of liquid, the exhaust port is sealed, preventing leakage. The exhaust mechanism, through the use of upper and lower one-way plates, gathers small flow streams into a single flow stream, ensuring measurement accuracy. Simultaneously, a slag collection slope removes sand and gravel from the liquid. The output mechanism can adjust the opening size of the connecting pipe according to the outflow rate, reducing the liquid velocity and preventing damage to downstream equipment due to excessive flow velocity.