Smoke-wire visualization system

System Description:

The Hanghua SW02 smoke wire instrument utilizes capacitor discharge heating to attach oil droplets to the surface of a resistance wire, causing them to produce traces that move with the wind to display the fine turbulent structures in the flow field. The system uses a single-lens reflex camera and ordinary external flashlights, offering reliable performance at a reasonable price. The SW02 can clearly display small vortices in the flow field at a velocity of 15m/s, making it a leader among similar products.

Applications:

It can be applied in basic turbulent flow research and can also be used in fields such as:

Aerospace

Energy and power engineering

Wind engineering

HVAC (Heating, Ventilation, and Air Conditioning) and indoor environment

Main Features:

Uses a single-lens reflex camera and external flashlights as the shooting devices, making it particularly suitable for educational purposes.

Uses large-capacity capacitors as power sources, with high discharge current (up to 20A), short discharge time (usually 20-30 milliseconds), no need to shut down power (greatly reducing the chance of burning the metal wire), and large smoke generation.

Addresses the difficulty of shooting due to short smoke generation time by employing a microcontroller to command a series of actions including pre-lifting the reflex board, power discharge, opening the shutter, flashing the flashlight, closing the shutter, and charging the capacitor.

Due to the integration of the above technologies, the Hanghua SW02 can obtain clear turbulent structure photos at a flow velocity of 13m/s, far exceeding conventional smoke wire display techniques.

The SW02 visualization instrument has built-in protection circuits to ensure the safety of the camera and the experimenter (especially suitable for undergraduate experiments).

The Pro version of the instrument can simultaneously drive two metal wires and command two independent flashlights to flash, marking the same vortex structure in different colors within the same photo. This allows researchers to directly observe the spatiotemporal evolution of turbulent structures.

Parameters:

Delivery Time:

10 weeks; 3-year warranty.

System Includes:

1 main unit

1 Canon DSLR camera

1 tripod

1 set of camera wireless triggers

1 flash unit

2 sets of standard connecting cables

30 meters of metal wire

100 milliliters of paraffin oil

Remote installation, debugging, training, and guidance.

Current Users:

Central South University

Dalian Maritime University

Hunan University

University of South China

Shanghai University

Tianjin University

Yangzhou University

Chongqing University

Sun Yat-sen University

Sichuan University

Beihang University (BUAA)

Southern University of Science and Technology (SUSTech)

University of Chinese Academy of Sciences

Harbin Institute of Technology (HIT)

Nanjing University

Tsinghua University, Department of Energy

Tongji University

Institute of Engineering Thermophysics, Chinese Academy of Sciences

Hong Kong University of Science and Technology (Guangzhou)

Jilin University, Automotive Engineering Institute

Beihang University Ningbo Innovation Institute

Shanghai Jiao Tong University, School of Naval Architecture, Ocean and Civil Engineering

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