Principle and Characteristics of Jet Fans

Principle and Characteristics of Jet Fans
Jet Fan is a special type of axial fan based on fluid dynamics principles. Its core working principles are:
High-speed jet formation: When air passes through the nozzle, the cross-sectional area suddenly narrows, causing a sharp increase in velocity and a decrease in pressure.
Negative pressure suction effect: The high-speed jet creates a low-pressure zone around it, drawing in low-energy media (such as air) from the surroundings into the suction inlet, where it mixes with the jet and is discharged.
Thrust generation: The force (thrust) exerted by the fan on the air is "equal in magnitude and opposite in direction" to the force received by the support, enabling efficient ventilation or smoke extraction.
Performance Characteristics of Jet Fans
High Efficiency and Energy Savings
Utilizing advanced design, it fully leverages the kinetic energy of gases, generating high air pressure even at low speeds, reducing energy consumption by 20%-30% compared to traditional fans.
Suitable for scenarios requiring high flow rates and low pressure, such as tunnel ventilation, helping to save operational costs.
Compact Structure and Flexible Installation
Small size and lightweight, it can be suspended from the top or sides of tunnels, occupying no floor space and requiring no additional duct construction.
Supports bidirectional ventilation, allowing adjustment of operation direction to meet different ventilation needs (e.g., smoke extraction during fires).
Low Noise and Stable Operation
Optimized design of fan blades and air inlets ensures noise levels below 65 decibels, meeting indoor environmental requirements.
Smooth operation, easy maintenance, and a lifespan of over 10 years.
Strong Adaptability
Reversible design: In emergencies such as tunnel fires, it can operate in reverse to extract smoke, ensuring personnel safety.
Resistance to external interference: By adjusting nozzle angles or adding auxiliary equipment, it can handle complex airflow environments.
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