Quality of Laser Induced Fluorescence Testing System for Laser Induced Combustion Field Plane

Plane laser-induced fluorescence velocimetry systemProduct Description:

The planar laser-induced fluorescence combustion field diagnostic system uses ultraviolet laser excitation to emit specific spectra of combustion components related to the combustion field. The specific spectra are recorded, and through image processing, the concentration of relevant components or combustion field temperature is obtained to determine the combustion conditions and efficiency in different environments.

The application field is mainly used for the combustion of solid propellants, liquid propellants, and gas propellants, studying combustion phenomena such as flames, combustion furnaces/reactors, turbines, high-pressure combustion systems, chemical reactors, and investigating ignition phenomena, shock tubes, and internal combustion phenomena of gasoline and diesel engines. The distribution of OH *, CH *, C2 * and other components, flame temperature, flame position and stability, flame front position and propagation, and ignition phenomenon.

Plane laser-induced fluorescence velocimetry systemTechnical Indicators:

(1) YAG pulse laser
Brand: Spectral Physics
脉冲能量： 1000mJ@1064nm ， 500mJ@532nm ， 250mJ@355nm ， 110mJ@266nm
Beam diameter:<10mm
Repetition frequency: 10 Hz
(2) Dye laser
After excitation with a YAG laser, different dyes can be used to pump at 532nm or 355nm, respectively, to obtain lasers that can excite four different free radicals: OH, NO, CO, and CH; Equipped with BBO crystal group.
(3) UV film light source component
Focal length: adjustable from 0.3-2m
Film thickness: adjustable within the range of 0.5mm-1.5mm;
Film height: adjustable within the range of 30-50mm;
Equipped with UV collimator
Equipped with a UV prism group, it can be used to adjust the height of the sheet light
(4) Precision laser optical arm
Greater than 1.6 meters, 360 ° free rotation, heavy hammer stable design, wavelengths of 532nm and 266nm, high damage threshold, transmittance up to 96%;
(5) Image recording system CCD camera
Equipped with dual exposure function;
Dynamic range: 12 bits;
Resolution: 1344 x 1024 pixels;
Spectral range: 290-1100 nm;
Quantum efficiency: over 65% @ 500 nm;
Frame rate: 10 frames per second;
UV lens, aperture F/2.8, small focusing distance 45cm; projection efficiency of 250-410nm not less than 90%.
(6) Image intensifier part
UV quantum efficiency 15% -30%
Door width: 10 ns-80 ms (preferably as small as 3ns)
Time delay: 60 ns -80 ms
TTL trigger
(7) High-precision synchronizer
8-channel output, 2-channel input, 4 or more triggering modes, 250ps time resolution, capable of computer programming and manual control simultaneously;
It is recommended to equip an internal combustion engine synchronizer, which can achieve fully automatic low-frequency cycle phase scanning function and continuously record the change process of phenomena at different times (phases) of the cycle period.
(8) Laser energy online monitor
The wavelength range is 200-1100nm, including 10% -80% attenuation plates;
Adjustable 5-fold gain;
Adjustable aperture size to adjust sensitivity.
(9) Filter
OH filter, NO filter, CO filter, CH filter, LII filter;
(10) Software Platform
Can be used for overall system parameter setting and control, image acquisition and preprocessing, supporting driver control of hardware such as synchronizers, lasers, cameras, etc;
Support real-time display, storage, and analysis of images, enabling long-term continuous acquisition;
Support TCP/IP remote control;
The image processing interface is user-friendly, easy to operate, fully functional, and upgradable;
It has non-linear calibration and analysis functions for scalar fields, and provides open source code for software processing of later data files.
Including: LIF software module, LII software module, absorption correction software module, spray measurement software module and wavelength tuning module. Thus, the measurement data of the relative concentration distribution of free radicals OH, NO, CH and CO generated by combustion, the data of the relative concentration distribution of soot generated by combustion and the data related to spray can be processed;
Including: software module for temperature field prediction based on relevant free radical concentrations;
Capable of searching for dye laser peaks, convenient to use.
(11) Other
Equipped with laser mounting bracket;
Equipped with calibration furnace;
The system operates reliably, stably, and securely.