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Close Circuit Wind Tunnel

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Close Circuit Wind Tunnel Specification

Material
Mild Steel Body with Acrylic Test Section

Processing Type
Airflow Simulation

Condition
New

Technology
Closed Circuit Subsonic Wind Tunnel

Dimension (L*W*H)
2500 mm x 900 mm x 1700 mm

Power Mode
Electric

Voltage
220-240V AC, 50Hz

Power Consumption
2-5 kW

Pressure Output
Low Pressure to Atmospheric

Application
Aerodynamics Experimentation, Educational Demonstrations, Research & Development

Coating Type
Powder Coated

Accessories
Manometer, Pitot Static Tube, Smoke Generator, Model Holders, Digital Display Unit

Frame Finish
Epoxy Painted Steel Frame

Safety Features
Overload Protection, Emergency Stop Button

Flow Uniformity
1% across test section

Control System
Digital Speed Controller

Drive Type
Variable Speed Axial Flow Fan

Measurement Range
Velocity, Static & Dynamic Pressure, Drag Force

Equipment Type
Wind Tunnel Apparatus

Test Section Size
300 mm x 300 mm x 600 mm

Fan Blade Material
Aluminium

Noise Level
<70 dB

Working Speed
0.5 - 40 m/s (adjustable)

Calibration
Factory Calibrated with Certificate

Mobility
Mounted on Lockable Castor Wheels

Window Material
Clear Acrylic

About Close Circuit Wind Tunnel

Overview

High-performance closed-circuit wind tunnels engineered for precision aerodynamic testing and energy-efficient operation. Built with robust steel construction, these systems offer complete design flexibility to accommodate space constraints, structural limitations, and specialized research requirements.

Designed primarily as single-return, horizontal circuits, each system delivers exceptionally stable, low-turbulence airflow suitable for advanced R&D and academic applications.

Key Advantages

Ultra-Low Turbulence: Typically, < 0.10% across full speed range
Energy Efficient: Lower power requirement vs. open-circuit tunnels
Stable Flow Conditions: Isolated from ambient lab disturbances
Low Noise Operation
Clean Airflow: Dust and particulates contained within the circuit
Enhanced Equipment Safety: Reduced risk to fan system

Technical Datasheet (Typical Ranges)

Performance

Airspeed Range: 5 to 150 m/s (customizable based on design)
Turbulence Intensity: < 0.10%
Flow Uniformity: 0.5% across test section

Circuit Configuration

Type: Single-return (standard), multi-return/custom available
Orientation: Horizontal (vertical/custom layouts optional)
Construction: Heavy-duty steel fabrication

Test Section

Size Range: 0.3 m 0.3 m to 3 m 3 m (customizable)
Length: 1 m to 10 m
Access: Modular panels, optical windows, instrumentation ports

Flow Conditioning

Contraction Section:

Ratio: 6:1 to 12:1 (typical)
Profile: 5th- or 9th-order polynomial contour for smooth acceleration

Settling Chamber: Multi-stage flow straightening and screening
Diffusers & Corners: Optimized for minimal pressure loss

Design Considerations

Advantages vs Open Circuit

Lower operating power for equivalent speeds
Controlled environment for particulate or sensitive testing
Minimal external airflow interference
Reduced acoustic emissions

Limitations

Higher capital cost (~23 for similar test section size)
Larger installation footprint
Heat buildup during extended operation
Not ideal for combustion or exhaust-intensive testing

Customization Options

Low-height or space-constrained layouts
Integration around building columns/structures
Thermal control systems (cooling/heat exchangers)
Advanced instrumentation & automation
Specialized test sections (aeroacoustics, automotive, UAV, etc.)

Applications

Aerospace and automotive aerodynamics
High-precision research and calibration
Environmental and flow physics studies
Academic laboratories and national research centres

Precision in Aerodynamics

Engineered for accuracy, the Closed Circuit Wind Tunnel enables meticulous measurement of velocity, static and dynamic pressures, and drag force. Its advanced control system provides stable and repeatable test conditions essential for detailed research and educational experimentation. With clear acrylic test section windows, it offers direct observation and analysis of airflow patterns around models.

Durable and User-Friendly Design

Constructed with an epoxy-painted steel frame and clear acrylic panels, this wind tunnel combines robustness with ease of use. It is mounted on lockable castor wheels for convenient mobility and features digital controls alongside safety measures like overload protection and an emergency stop button, making it suitable for long-term academic and industrial deployment.

FAQ's of Close Circuit Wind Tunnel:

Q: How do I adjust the airflow speed in the wind tunnel?

A: The airflow speed can be easily adjusted from 0.5 to 40 m/s using the digital speed controller, allowing you to set the desired testing conditions precisely for various experiments and research needs.

Q: What types of measurements can be conducted within the test section?

A: This wind tunnel supports measurements of airflow velocity, static and dynamic pressures, and drag force. Instruments such as a manometer and pitot static tube are included to facilitate these evaluations.

Q: When is factory calibration required, and is certification provided?

A: The wind tunnel comes factory calibrated and includes a calibration certificate, ensuring immediate readiness and accurate results. Periodic recalibration may be advised based on usage intensity or compliance requirements.

Q: Where can this wind tunnel apparatus be utilized effectively?

A: It is suited for use in educational institutions, research centers, and development laboratories where aerodynamic phenomena need to be demonstrated, studied, or analyzed with precision and safety.

Q: What is the process for conducting an aerodynamic experiment using this setup?

A: To conduct an experiment, secure the model in the holder, set the desired speed through the digital controller, and utilize included accessories such as the smoke generator for flow visualization. Data can be recorded via the digital display unit and analyzed accordingly.

Q: How does the design ensure safety during operation?

A: Safety features include overload protection, an emergency stop button, and robust construction materials. The apparatus is also equipped with low-noise operation and lockable wheels to ensure user safety and comfort during use.

Q: What are the key benefits of choosing this wind tunnel over others?

A: Key advantages include highly uniform flow, adjustable speed, clear visibility for observation, comprehensive measurement capabilities, mobility, and enhanced safety-all suitable for a wide range of aerodynamic studies and demonstrations.

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