I. Product Overview: Visualizing Abstract Principles
The core mission of the MR3146 fluid dynamics research experiment stand is to make the invisible fluid energy loss clearly visible. It achieves this through a simple principle: the difference in liquid column height is the pressure difference.
The experiment stand features two parallel pipe loops, sharing an inlet and outlet, but with different diameters (copper pipes with inner diameters of 13.6mm and 26.2mm, respectively). Each loop is carefully arranged with various typical pipe components:
Straight Pipe Section: Studying friction loss along the pipe.
Right-Angle Elbow and Circular Elbow: Studying local losses and comparing the effects of different bending shapes. Sudden contraction and expansion: Observe the dramatic energy dissipation caused by abrupt changes in the flow channel cross-section.
Gate valves and ball valves: Demonstrate how valve opening precisely controls flow resistance.
The pressure changes as the fluid flows past these components. The experimental platform uses a set of multi-tube manometers to visually display the pressure at each test point in millimeters of water column height. By simply observing the liquid level difference, students can immediately understand the physical meaning of "pressure loss."
 
II. Design Features: Robust, Flexible, and User-Friendly
Integrated steel frame structure: The entire frame is made of steel with a corrosion-resistant paint finish, ensuring the long-term durability of the equipment.
Easy to move: Equipped with casters at the bottom, it is easy to move and arrange flexibly in the laboratory.
Dual-loop comparison system: Two parallel pipes of different diameters allow for comparative experiments, providing a deep understanding of the impact of pipe diameter on flow velocity and pressure loss.
Intuitive measurement system: The core back-pressure multi-tube manometer transforms the abstract pressure difference measurement into the most intuitive liquid level reading, resulting in excellent teaching effectiveness.
Basic Performance Parameters
Dimensions: 2600 x 800 x 1700 mm (Length x Width x Height)
Maximum Flow Rate: 17.2 L/min
Operating Environment: Ambient temperature 5℃～+40℃, relative humidity <85% (25℃)

III. Core Experimental Content: From Operation to Inquiry
The MR3146 supports a series of experiments progressing from simple to complex, helping students gradually build a complete understanding of piping systems.
3.1 Flow Regulation Experiment
Learn how to use pumps and valves to regulate the total flow rate of the system and observe the impact of flow rate changes on the overall pressure drop of the system.
3.2 Zeroing and Usage of Level Gauge
Mastering the correct use of measuring instruments is the first step. Learn how to initially zero a multi-tube gauge to ensure accurate readings.
3.3 Pipeline Loss Experiment (Core)
This is the core function of the experimental setup. Measure the pressure difference before and after fluid flows through straight pipes, elbows, reducers, and expanders.
Reflection: Why is the pressure drop greater in a smaller diameter pipe at the same flow rate? Why does a sharp turn lose more energy than a gentle turn?
3.4&3.5 Gate Valve & Ball Valve Adjustment Experiment
Compare the flow and resistance characteristics of two common valves. By changing the valve opening, observe its effect on downstream pressure and understand the role of the valve as an "adjustable resistance element" in the system.
 
IV. Teaching Significance and Value
The MR3146 is not just a piece of equipment, but a complete fluid mechanics teaching platform. It transforms concepts such as the Darcy-Weisbach formula and local loss coefficient from textbooks into tangible, observable, and measurable realities. Through hands-on operation, data recording, and phenomenon analysis, students can:
Deepen theoretical understanding: Correspond the variables in the formulas to real physical quantities (liquid column height, flow rate).
Develop engineering intuition: Intuitively experience the relationship between pipe diameter, flow velocity, pipeline complexity, and pumping energy consumption.
Master experimental skills: Learn basic operation, parameter measurement, and data analysis methods for fluid systems.
For students majoring in energy and power engineering, chemical engineering, mechanical engineering, or environmental engineering, understanding and being able to calculate pipeline pressure loss is a crucial fundamental skill. The MR3146 teaching experimental platform serves as a solid bridge between theory and practice, and between principles and applications.
Attachments: The experimental platform is also equipped with a full range of accessories, including an inflation device, hoses, pipe plugs, and pipe clamps, ensuring that all experiments can be completed safely and smoothly.

V. Summary
Through this system, the "energy story" told by the silent fluid flowing in the pipes can finally be clearly heard and interpreted.