#Fastcam sa x2 full#
#Fastcam sa x2 series#

Use of intensification and longer inter-frame delay generally improved precision. Excluding the LaVision Imager sCMOS, the cameras were tested with and without intensification and with both short and long inter-frame delays. The camera comparison included a pco.dimax HD, a LaVision Imager scientific CMOS (sCMOS) and a Photron FASTCAM SA-X2, along with a two-stage LaVision HighSpeed IRO intensifier. When binning row-wise by 8 pixels (about the thickness of the tagged region) and using an inter-frame delay of 65 microseconds, precisions of 0.5 meters per second in air and 0.2 meters per second in nitrogen were achieved. These techniques generally improved precision however, binning provided the greatest improvement to the un-intensified camera systems which had low signal-to-noise ratio. Methods of enhancing the precision of the measurement were explored such as digital binning (similar in concept to on-sensor binning, but done in post-processing), row-wise digital binning of the signal in adjacent pixels and increasing the time delay between successive exposures. The precision was defined as the standard deviation of a set of several hundred single-shot velocity measurements. Also, we compare the performance of several different high-speed CMOS camera systems for acquiring FLEET velocimetry data in air and nitrogen free-jet flows. In this paper, we seek to determine the fundamental precision of the FLEET technique using high-speed complementary metal-oxide semiconductor (CMOS) cameras. Descriptions of the optical arrangements, operating conditions, and the image post-processing methodologies used to obtain quantitative measurements of liquid depths from the LIF signal have been outlined.Precision of FLEET Velocimetry Using High-Speed CMOS Camera Systems Femtosecond laser electronic excitation tagging (FLEET) is an optical measurement technique that permits quantitative velocimetry of unseeded air or nitrogen using a single laser and a single camera. The FASTCAM SA-X2 high-speed camera system has been designed to provide a careful balance of these requirements. This two-angle detection configuration allows for the identification and more accurate account of the irregular liquid bodies formed in the jet. fastcam sa-x2 In order to meet the requirements of the most demanding high-speed imaging applications a balance of high frame rate, image resolution, dynamic range and light sensitivity is required. In this case, two high-speed cameras orientated at 90Лљ are used to simultaneously image the liquid jet. This configuration enabled the finer structures of the jet to be resolved. In the second part, the viewable area was reduced to 28 mm, and ~400 images were recorded at 50 000 frames per second resulting in a temporal resolution of 20 Вµs. In the first portion, the interrogation area measures a distance of 160 mm along the jet, and includes sets of ~800 images, recorded at 40 000 frames per second, corresponding to a temporal resolution of 25 Вµs. The experiment is divided into two parts. The alternate approach proposed here employs photographing a fluorescing liquid, using Laser Induced Fluorescence (LIF) allowing us to deduce the volume of the imaged liquid structures.

Historically, high-speed videos of liquid jet disintegration have been captured via shadowgraphy imaging techniques.

#Fastcam sa x2 full#

The Photron FASTCAM SA-X2 is a balance of high frame rate, image resolution, dynamic range and light sensitivity featuring up to 12,500 frames per second at full resolution ( 1024 x 1024 pixels) and 480,000 frames per second at reduced resolutions. In this study, only the liquid injection pressure was varied, reaching a maximum Reynolds number of approximately 60 000. Your Name (required) Your Email (required) Contact Number. The injector under examination has a single orifice 0.60 mm in diameter and was used to inject water into quiescent air at atmospheric temperature and pressure. The main goal of this work is to provide an extensive open access database of high-speed images and videos for modelers and researchers in the field of fluid mechanics studying the dynamics of a liquid jet transiting from the Rayleigh to the atomization regimes.

#Fastcam sa x2 series#

This paper is Part I in a series of articles focused on a fundamental study on liquid jet disintegration.