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The Jiudian Gorge water conservancy hub at the Tao River in Gansu Province is located at the entrance of the Jiudian Gorge in the middle reaches of the Yellow River tributary, Tao River. The project has a total capacity of 943 million m3 and is an all-year balancing reservoir. Under normal water level conditions, the maximum water depth in front of the dam is 103 m. The water temperature structure...
In order to accurately analyze the effect of temperature difference on the stress distribution of the test docking basket under vacuum and low temperature environment, according to the measured temperature data of the docking basket, the force-thermal coupling model of the docking basket in vacuum and low temperature environment was established. The equivalent stress is 275MPa, which exceeds the yield...
Swirl injectors have been widely used in gas turbines to form the swirling flames, and thus increase the combustion efficiency. The temperature distribution of the swirling flame reflects the combustion efficiency to a large extent. In this paper, the tunable diode laser absorption spectroscopy (TDLAS)-based tomography system was developed to reconstruct the two-dimensional temperature distribution...
In this paper, one-dimensional tunable diode laser absorption spectroscopy tomography (1D-TDLAST) is employed to reconstruct the rotationally symmetric temperature distribution for the swirling flame generated by a swirl-stabilized gas turbine model combustor. The H2O transitions at 7185.597 cm−1 and 7444.36 cm−1 are used because of their moderate line strengths and good temperature sensitivities...
Effects of increasing the numbers of views and spectral lines on hyperspectral temperature distribution tomography is compared in this paper via numerical experiments. The theory of multi-view hyperspectral temperature tomography is introduced mathematically, and some basic principles are explained. Given a bimodal Gaussian distribution, simulation results are obtained by changing the numbers of views...
Fan-beam tunable diode laser absorption spectroscopy (TDLAS) system was combined with onion-peeling deconvolution to reconstruct axisymmetric temperature and gas concentration distributions. The fan-beam TDLAS system consists of two tunable distributed feedback diode lasers at 7185.597 and 7444.36 ${\rm cm}^{-1}$ , a cylindrical lens and multiple photodiode detectors in a linear detector array. When...
In this paper, single view fan-beam tomography using tunable diode laser absorption spectroscopy (TDLAS) is introduced for measuring axisymmetric temperature distribution. Generated by a well-collimated laser through a cylindrical lens, the fan beam laser crosses the target region and is detected by seven photodiode receivers. Under the condition of axisymmetric temperature and gas concentration distribution,...
In this paper, Tikhonov regularization method, with its regularization parameter determined by L-curve criterion, is applied to measure nonuniform temperature distribution based on line-of-sight tunable diode laser absorption spectroscopy (TDLAS) through simulation. By using temperature binning method, number of bins should be increased in order to resolve the temperature distribution more definitely...
In this paper, the one-dimensional time-varying model of thundercloud electrification has been used for simulating two thunderstorm processes by using observations of CCOPE and STEPS primarily, and discussing the effect of surface temperature and reversal temperature on electrical process of thundercloud from sensitivity tests. In the model, Fletcher glaciation mechanism and Hallett-Mossop glaciation...
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