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Numerical simulation of WCF droplets trajectories using Ansys Fluent 基于Ansys Fluent的WCF液滴轨迹数值模拟
Atmospheric and Ocean Optics Pub Date : 2022-12-07 DOI: 10.1117/12.2644552
Y. Loboda
{"title":"Numerical simulation of WCF droplets trajectories using Ansys Fluent","authors":"Y. Loboda","doi":"10.1117/12.2644552","DOIUrl":"https://doi.org/10.1117/12.2644552","url":null,"abstract":"The results of numerical simulation using Ansys Fluent software of the droplets trajectories formed during the atomization of water-coal fuel (WCF) using pneumatic mechanical nozzles are presented. The trajectories of two qualitatively different systems are modeled: coal “particle droplets” and water-coal droplets. It is found that the trajectories of moving “particle droplets” and WCF droplets in the vortex chamber have the form of spirals, while the residence time of burning “particle droplets” and WCF droplets in the furnace is proportional to their diameter, which makes it possible to ensure their near-complete burnout.","PeriodicalId":217776,"journal":{"name":"Atmospheric and Ocean Optics","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128420260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simulation of the influence of solar proton events on propagation of VLF radio signals in the polar region 太阳质子事件对极区VLF无线电信号传播影响的模拟
Atmospheric and Ocean Optics Pub Date : 2022-12-07 DOI: 10.1117/12.2644953
O. Akhmetov, I. Mingalev, O. Mingalev, V. Belakhovsky, Z. Suvorova, E. Maurchev, Y. Balabin
{"title":"Simulation of the influence of solar proton events on propagation of VLF radio signals in the polar region","authors":"O. Akhmetov, I. Mingalev, O. Mingalev, V. Belakhovsky, Z. Suvorova, E. Maurchev, Y. Balabin","doi":"10.1117/12.2644953","DOIUrl":"https://doi.org/10.1117/12.2644953","url":null,"abstract":"The effect of proton events of various intensities on the propagation of VLF radio signals are studied by a series of computational experiments. Various events are considered, both real GLE (ground-level enhancement) 70 and 72 and fully synthetic electron density profiles. The profiles were constructed using the RUSCOSMICS and GDMI (Global Dynamic Model of Ionosphere) models developed by the PGI and IZMIRAN. Synthetic profiles obtained using the GDMI model were used as baselines for quiet conditions and subsequent obtaining of disturbed profiles. Modeling of electromagnetic signals was carried out by a numerical model of electromagnetic wave propagation developed at PGI. The signal of the model source was the sum of harmonic oscillations at the frequencies of the RSDN-20 long-range navigation radio system (11905, 12679, 14881 Hz). Amplitude damping coefficients and phase changes are calculated for GLEs of different intensities. Calculations for high-latitude and mid-latitude regions showed the presence of a latitudinal dependence of the influence of GLE events on the amplitudes and phases of the RSDN-20 signals.","PeriodicalId":217776,"journal":{"name":"Atmospheric and Ocean Optics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115259668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Peculiarities of calculating a database of light backscattering matrices on hexagonal ice particles of cirrus clouds larger than 100 µm by the physical optics method 用物理光学方法计算大于100µm的卷云六边形冰粒光后向散射矩阵数据库的特点
Atmospheric and Ocean Optics Pub Date : 2022-12-07 DOI: 10.1117/12.2645046
I. Tkachev, A. Konoshonkin, V. Shishko, D. N. Timofeev, N. Kustova
{"title":"Peculiarities of calculating a database of light backscattering matrices on hexagonal ice particles of cirrus clouds larger than 100 µm by the physical optics method","authors":"I. Tkachev, A. Konoshonkin, V. Shishko, D. N. Timofeev, N. Kustova","doi":"10.1117/12.2645046","DOIUrl":"https://doi.org/10.1117/12.2645046","url":null,"abstract":"A technique is proposed that makes it possible to significantly accelerate the solution of the problem of light scattering in the exact backscattering direction on particles larger than 100 microns within the framework of the physical optics method. The peculiarities of this technique is that the solution is constructed within the vicinity of a small number of nodal points. Then, in the resulting solution, one complete period of interference oscillations is allocated and the light scattering matrix is averaged in this range. The average value is entered into the database. In this way, it was possible to build a complete database of backscattering matrices for atmospheric ice particles with sizes from 10 to 1000 microns for wavelengths of 0.355, 0.532, 1.064, 1.55, 2 and 2.15 microns. The results obtained make it possible to improve the algorithms for interpreting the data of laser sensing of cirrus clouds.","PeriodicalId":217776,"journal":{"name":"Atmospheric and Ocean Optics","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115486137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The influence of turbulence on propagation of femtosecond laser pulses along 100-m path 湍流对飞秒激光脉冲100米路径传输的影响
Atmospheric and Ocean Optics Pub Date : 2022-12-07 DOI: 10.1117/12.2644912
D. Apeksimov, P. A. Babushkin, A. A. Zemlyanov, A. M. Kabanov, D. I. Kochetov, V. Oshlakov, A. V. Petrov, E. E. Khoroshaeva
{"title":"The influence of turbulence on propagation of femtosecond laser pulses along 100-m path","authors":"D. Apeksimov, P. A. Babushkin, A. A. Zemlyanov, A. M. Kabanov, D. I. Kochetov, V. Oshlakov, A. V. Petrov, E. E. Khoroshaeva","doi":"10.1117/12.2644912","DOIUrl":"https://doi.org/10.1117/12.2644912","url":null,"abstract":"We present the results of the turbulent layer influence on the characteristics of the filamentation domain at the path beginning for the beams with a diameter of 2.5 and 5 cm. Addition of turbulence results in the fact that the beginning of the multiple filamentation domain (MFD) to the source coming closer. Decreasing of the distance to the beginning and end of the MFR in the presence of turbulence is inappreciable (<10%). The turbulent layer formed at the beginning of the path leads to a multiple increase in the number of the intense channels (~ 1011-1012 W/cm2) with a length >100 m.","PeriodicalId":217776,"journal":{"name":"Atmospheric and Ocean Optics","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114455629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Results of AOD measurements and aerosol dispersion composition in atmosphere of the Baikal region during wildfires in summer 2021 2021年夏季贝加尔湖地区森林大火期间大气AOD测量结果及气溶胶弥散组成
Atmospheric and Ocean Optics Pub Date : 2022-12-07 DOI: 10.1117/12.2644935
A. Dementeva, G. Zhamsueva, A. Zayakhanov
{"title":"Results of AOD measurements and aerosol dispersion composition in atmosphere of the Baikal region during wildfires in summer 2021","authors":"A. Dementeva, G. Zhamsueva, A. Zayakhanov","doi":"10.1117/12.2644935","DOIUrl":"https://doi.org/10.1117/12.2644935","url":null,"abstract":"The paper analyzes the optical and microphysical properties of aerosols at station Tory (AERONET), at \"Boyarsky\" station and the mass concentration of microdispersed aerosol of PM10 and PM2.5 fractions in July-September 2021. A high content of AOD aerosol (τ0.5) was detected in August at a wavelength of 0.5 microns, which was 0.92. During of strong smoke in the atmosphere, an increase in the radius of fine particles up to 0.26 μm and volume concentration up to 0.11 μm3/μm2 was noted. Because the physical properties and chemical composition of smoke aerosols change significantly with plume age, with the size and mass of smoke aerosols increasing with aging.","PeriodicalId":217776,"journal":{"name":"Atmospheric and Ocean Optics","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114205232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Development of mobile lidar system for monitoring of tropospheric ozone and aerosol 对流层臭氧和气溶胶监测移动激光雷达系统的研制
Atmospheric and Ocean Optics Pub Date : 2022-12-07 DOI: 10.1117/12.2644883
A. Nevzorov, A. Nevzorov, O. Kharchenko, A. P. Makeev
{"title":"Development of mobile lidar system for monitoring of tropospheric ozone and aerosol","authors":"A. Nevzorov, A. Nevzorov, O. Kharchenko, A. P. Makeev","doi":"10.1117/12.2644883","DOIUrl":"https://doi.org/10.1117/12.2644883","url":null,"abstract":"Within the Russian Science Foundation (RSF) project 21-79-10051 we developed a mobile lidar system for monitoring of tropospheric ozone and aerosol at the sensing wavelengths 299/341 nm. The lidar system is created on the basis of the QX 500 laser (“SOLAR LS”, Belarus) and Cassegrain telescope with receiving mirror diameter of 0.35 m and focal length of 0.7 m. Balancing and commissioning of laser source are carried out. Tests of receiving-transmitting lidar channel showed that the mobile lidar can cover the altitude range from ~0.1 to 12 km.","PeriodicalId":217776,"journal":{"name":"Atmospheric and Ocean Optics","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127246157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation of water-atmosphere carbon balance in the coastal zone of Lake Baikal based on the CO2/CH4 fluxes 基于CO2/CH4通量的贝加尔湖海岸带水-大气碳平衡估算
Atmospheric and Ocean Optics Pub Date : 2022-12-07 DOI: 10.1117/12.2645414
D. Pestunov, V. Domysheva, M. Sakirko, A. Shamrin, M. V. Panchenko
{"title":"Estimation of water-atmosphere carbon balance in the coastal zone of Lake Baikal based on the CO2/CH4 fluxes","authors":"D. Pestunov, V. Domysheva, M. Sakirko, A. Shamrin, M. V. Panchenko","doi":"10.1117/12.2645414","DOIUrl":"https://doi.org/10.1117/12.2645414","url":null,"abstract":"Long-term observation series of carbon dioxide and methane fluxes in the water-atmosphere system in the coastal zone of Lake Baikal are analyzed. It is shown that the total sink of carbon dioxide from the atmosphere to the water surface is 5.9 gСО2 m-2 year-1, while the methane emission from water is estimated as 80 mgСН4 m-2 year-1. For comparative estimation of the radiative forcing, it is taken that the contribution of the atmospheric methane molecule to global warming is 27 times greater than that of the СО2 molecule. Then, the coastal area of Lake Baikal contributes to global warming due to the methane emission 8-20% more than to the cooling due to absorption of carbon dioxide by the water.","PeriodicalId":217776,"journal":{"name":"Atmospheric and Ocean Optics","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125974817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation of the methane release intensity from the Arctic shelf bottom sediments 估算北极陆架底层沉积物的甲烷释放强度
Atmospheric and Ocean Optics Pub Date : 2022-12-07 DOI: 10.1117/12.2644854
V. Malakhova, A. Eliseev
{"title":"Estimation of the methane release intensity from the Arctic shelf bottom sediments","authors":"V. Malakhova, A. Eliseev","doi":"10.1117/12.2644854","DOIUrl":"https://doi.org/10.1117/12.2644854","url":null,"abstract":"Large reserves of carbon are preserved under conditions of subsea permafrost in the bottom sediments of the Arctic shelf. The existence of permafrost has created the necessary conditions for the thermodynamic stability of methane hydrates. Using a mathematical model that describes the thermal state of the sediment, we analyzed the dynamics of the permafrost and methane hydrates stability zone of the Arctic shelf bottom sediments for 100 thousand years in the future. Climate changes are considered under an idealized scenario of CO2 emissions into the atmosphere and changes in the parameters of the earth's orbit. The simulations for the next 100 kyr found that at the middle and shallow parts of the shelf the subsea permafrost survives, at least, for 9 kyr after the emission onset or even for several tens of kiloyears. Model estimates of methane emission from the Arctic shelf sediments to the water amounts up to 10 g/m2 per year.","PeriodicalId":217776,"journal":{"name":"Atmospheric and Ocean Optics","volume":"2018 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128044825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Results of the development of software and hardware for automation of lidar measurements 激光雷达测量自动化软硬件开发成果
Atmospheric and Ocean Optics Pub Date : 2022-12-07 DOI: 10.1117/12.2644920
S. Sadovnikov, D. A. Tuzhilkin
{"title":"Results of the development of software and hardware for automation of lidar measurements","authors":"S. Sadovnikov, D. A. Tuzhilkin","doi":"10.1117/12.2644920","DOIUrl":"https://doi.org/10.1117/12.2644920","url":null,"abstract":"The results of development of an adjustment block for regulating the angular position of output mirror of a lidar in a semi-automatic mode are presented. The possibility of implementing an adjustment block using economical, widely used electronic components, such as an Arduino board and stepper motors, as well as 3D-printed mounting components, is shown. Appropriate software was developed to control this unit. The program for the automatic formation of a tuning curve of the laser with parametric generation of light and the program for the automatic measurement of the dependence of the pulse energy on the generation wavelength was developed.","PeriodicalId":217776,"journal":{"name":"Atmospheric and Ocean Optics","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123415050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Use of pure-rotational Raman scattering in measurements with a mobile Mie-Raman lidar 使用纯旋转拉曼散射测量与移动米-拉曼激光雷达
Atmospheric and Ocean Optics Pub Date : 2022-12-07 DOI: 10.1117/12.2645049
Y. Balin, M. Klemasheva, S. Nasonov, M. Novoselov, S. Samoilova, I. É. Penner
{"title":"Use of pure-rotational Raman scattering in measurements with a mobile Mie-Raman lidar","authors":"Y. Balin, M. Klemasheva, S. Nasonov, M. Novoselov, S. Samoilova, I. É. Penner","doi":"10.1117/12.2645049","DOIUrl":"https://doi.org/10.1117/12.2645049","url":null,"abstract":"Small-sized mobile lidars mainly use single-frequency sounding with registration of elastic backscattered radiation on aerosols. Mie-Raman lidars are used to correctly reconstruct the optical characteristics of an aerosol. The method most widely used in such lidar measurements for evaluating optical properties is the method of recording vibrational Raman scattering on nitrogen molecules. The disadvantages of this method are the low backscattering cross section and the significant frequency shift of the Raman vibrational component. These problems are solved by using purely rotational Raman scattering, which is characterized by a higher backscattering cross section, and a much smaller frequency shift, which practically eliminates the dependence on the Angstrom exponent. The paper presents the practical implementation of pure-rotational Raman measurements in the mobile lidar \"LOSA-A2\".","PeriodicalId":217776,"journal":{"name":"Atmospheric and Ocean Optics","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131590908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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