scholarly journals Model studies of a prototype of a small multifunctional ekranoplan

2021 ◽  
pp. 28-36
Author(s):  
К.В. Грибов ◽  
Г.А. Федореев ◽  
А.Ю. Журенко
Keyword(s):  
Wind Tunnel ◽  
Water Transport ◽  
3D Modeling ◽  
Climatic Conditions ◽  
Operating Conditions ◽  
Transport Infrastructure ◽  
The Arctic ◽  
Consumer Market ◽  
Model Studies ◽  
Snow Water

Использование экранопланов в различных климатических условиях, как многофункционального транспортного средства, обладающего амфибийными свойствами, позволяет решить множество задач на водном пространстве. Для труднодоступных территорий России экранопланы могут обеспечить доступность прибрежных населенных пунктов, расширив использование водного транспорта в межсезонье и при организации транспортных линий в зимний период или в Арктике. В статье рассмотрены результаты исследований по созданию лёгкого 2х-местного амфибийного экраноплана-трансформера для круглогодичного индивидуального и служебного использования в отсутствие транспортной инфраструктуры. Разрабатываемое транспортное средство будет объединять несколько принципов движения, адаптированных к различным условиям эксплуатации: по льду, снегу, воде, над водой посредством его конструктивной трансформации в аэросани, аэроглиссер и экраноплан для обеспечения конкурентного преимущества на потребительском рынке индивидуального водного транспорта. Выполнены работы по оптимизации аэродинамических схем трансформера с использованием продувок экспериментальных аэротрубных моделей и математического 3D моделирования. Акцент сделан на решении вопроса достижения максимального аэрогидродинамического качества. The use of ekranoplans in various climatic conditions as a multifunctional vehicle with amphibious properties makes it possible to solve key tasks on water areas. For remote territories of Russia, ekranoplans can maintain accessibility of coastal settlements, expanding the use of water transport in the off-season and when organizing transport lines in the winter and in the Arctic. The article discusses the results of research on the construction of a light 2-seater amphibious transformer ekranoplan for year-round personal and official use in the absence of transport infrastructure. The vehicle under development will combine several principles of movement adapted to various operating conditions: on ice, snow, water, over water - by means of its constructive transformation into an aerosled, an airboat and an ekranoplan to provide a competitive advantage in the consumer market for individual water transport. Work has been done to optimize aerodynamic schemes of the transformer using virtual blowdowns of experimental wind tunnel models based on mathematical 3D modeling. The emphasis is placed on solving the issue of achieving maximum aero- and hydrodynamic quality.

scholarly journals PROBLEM-DIALOGUE TECHNOLOGY OF FORMING ENVIRONMENTAL COMPETENCE AMONG SPECIALISTS FOR WORK IN THE ARCTIC AND SUBARCTIC CONDITIONS OF THE RUSSIAN FEDERATION

2019 ◽  
Vol 16 (32) ◽  
pp. 362-374
Author(s):  
Sergei A. PETROV ◽  
Natali L. MAMAEVA ◽  
Maksim V. NARUSHKO
Keyword(s):  
Oil And Gas ◽  
Rapid Development ◽  
Environmental Safety ◽  
Climatic Conditions ◽  
Value Orientations ◽  
Operating Conditions ◽  
The Arctic ◽  
Learning Technology ◽  
Strong Wind ◽  
Economic Activities

The economic development of the Arctic and the related disturbances in the natural equilibrium of northern ecosystems have become a source of environmental problems that have now become global. In this regard, the urgent question is about finding an affordable and effective learning technology aimed at developing, humanistic, personality-oriented education. In order to discuss the technology of environmental education, as a means of ensuring environmental safety, environmental management and sustainable development of the Arctic, we proposed a questionnaire for obtaining primary environmental and health information, the key point in which is the relationship of ecology and health. Approbation of the problem-dialogue technology of learning allowed, on the basis of clarifying environmental opinions and assessments, value orientations, attitudes, dispositions and stimulating cognitive motivation on the substantive content, to achieve competences to ensure the environmental safety of northern ecosystems during the economic activities of enterprises of the fuel and energy complex. This is especially important in the conditions of the Far North with difficult climatic conditions (geomagnetic background, sudden temperature changes, strong wind loads, the presence of permafrost, etc.) and the rapid development of the oil and gas complex (in particular, high accident rate associated with the complexity of technical devices, the use of extreme operating conditions, strong environmental influences, flammability and explosive hazards of mined products, human factor).

Light Railways as the Basic for Transport Infrastructure Development in Northern Territories of Russia

2020 ◽  
pp. 97-101
Author(s):  
P.I. Tarasov
Keyword(s):  
High Speed ◽  
Road Transport ◽  
Transport Infrastructure ◽  
The Arctic ◽  
Infrastructure Development ◽  
Capital Costs ◽  
New Type ◽  
The Republic ◽  
Northern Territories ◽  
Mode Of Transport

Research objective: studies of economic and transport infrastructure development in the Arctic and Northern Territories of Russia. Research methodology: analysis of transport infrastructure in the Republic of Sakha (Yakutia) and the types of railways used in Russia. Results: economic development of any region is proportional to the development of the road transport infrastructure and logistics. When a conventional railway is operated in the Arctic conditions, it is not always possible to maintain a cargo turnover that would ensure its efficient use, and transshipment from one mode of transport to another is very problematic. A new type of railway is proposed, i.e. a light railway. Conclusions: the proposed new type of transport offers all the main advantages of narrow gauge railroads (high speed of construction, efficiency, etc.) and helps to eliminate their main disadvantage, i.e. the need for transloading when moving from a narrow gauge to the conventional one with the width of 1520 mm, along with a significant reduction in capital costs.

Impact of climatic conditions on the parameters of failure flow of military vehicles

2021 ◽  
pp. 095440702110202
Author(s):  
Nikolaj Dobrzinskij ◽  
Algimantas Fedaravicius ◽  
Kestutis Pilkauskas ◽  
Egidijus Slizys
Keyword(s):  
Climatic Factors ◽  
Armed Forces ◽  
Climatic Conditions ◽  
Operating Conditions ◽  
Technical Equipment ◽  
Factors Affecting ◽  
Military Vehicles ◽  
Equipment Reliability ◽  
Number Of Factors ◽  
The Impact

Relevance of the article is based on participation of armed forces in various operations and exercises, where reliability of machinery is one of the most important factors. Transportation of soldiers as well as completion of variety of tasks is ensured by properly functioning technical equipment. Reliability of military vehicles – armoured SISU E13TP Finnish built and HMMWV M1025 USA built were selected as the object of the article. Impact of climatic conditions on reliability of the vehicles exploited in southwestern part of the Atlantic continental forest area is researched by a case study of the vehicles exploitation under conditions of the climate of Lithuania. Reliability of military vehicles depends on a number of factors such as properties of the vehicles and external conditions of their operation. Their systems and mechanisms are influenced by a number of factors that cause different failures. Climatic conditions represent one of the factors of operating load which is directly dependent on the climate zone. Therefore, assessment of the reliability is started with the analysis of climatic factors affecting operating conditions of the vehicles. Relationship between the impact of climatic factors and failure flow of the vehicles is presented and discussed.

scholarly journals Paleocene-Eocene volcanic segmentation of the Norwegian-Greenland seaway reorganized high-latitude ocean circulation

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Jussi Hovikoski ◽  
Michael B. W. Fyhn ◽  
Henrik Nøhr-Hansen ◽  
John R. Hopper ◽  
Steven Andrews ◽  
...  
Keyword(s):  
Ocean Circulation ◽  
High Latitude ◽  
Seismic Reflection ◽  
Arctic Region ◽  
Climatic Conditions ◽  
The Arctic ◽  
Early Eocene ◽  
Subaerial Exposure ◽  
Thermal Maximum ◽  
Volcanic Facies

AbstractThe paleoenvironmental and paleogeographic development of the Norwegian–Greenland seaway remains poorly understood, despite its importance for the oceanographic and climatic conditions of the Paleocene–Eocene greenhouse world. Here we present analyses of the sedimentological and paleontological characteristics of Paleocene–Eocene deposits (between 63 and 47 million years old) in northeast Greenland, and investigate key unconformities and volcanic facies observed through seismic reflection imaging in offshore basins. We identify Paleocene–Eocene uplift that culminated in widespread regression, volcanism, and subaerial exposure during the Ypresian. We reconstruct the paleogeography of the northeast Atlantic–Arctic region and propose that this uplift led to fragmentation of the Norwegian–Greenland seaway during this period. We suggest that the seaway became severely restricted between about 56 and 53 million years ago, effectively isolating the Arctic from the Atlantic ocean during the Paleocene–Eocene thermal maximum and the early Eocene.

scholarly journals High-time resolved radon-progeny measurements in the Arctic region (Svalbard Islands, Norway): results and potentialities

2017 ◽  
Author(s):  
Roberto Salzano ◽  
Antonello Pasini ◽  
Antonietta Ianniello ◽  
Mauro Mazzola ◽  
Rita Traversi ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Atmospheric Stability ◽  
Arctic Region ◽  
Climatic Conditions ◽  
The Arctic ◽  
Radon Emanation ◽  
Radon Progeny ◽  
Time Resolved ◽  
Scientific Challenge ◽  
The Arctic Region

Abstract. The estimation of radon progeny in the Arctic region represents a scientific challenge due to the required low limit of detection in consideration of the limited radon emanation associated with permafrost dynamics. This preliminary study highlighted, for the first time, the possibility to monitor radon progeny in the Arctic region with a higher time resolution. The composition of the radon progeny offered the opportunity to identify air masses dominated by long-range transport, in presence or not of near-constant radon progeny instead of long and short lived progenies. Furthermore, the different ratio between radon and thoron progenies evidenced the contributions of local emissions and atmospheric stability. Two different emanation periods were defined in accordance to the permafrost dynamics at the ground and several accumulation windows were recognized coherently to the meteo-climatic conditions occurring at the study site.

Mineral resources of the Vorkuta region and the prospects of their development

2021 ◽  
Vol 3 ◽  
pp. 65-74
Author(s):  
S.K. Kuznetsov ◽  
◽  
I.N. Burtsev ◽  
M.B. Tarbaev ◽  
N.N. Timonina ◽  
...  
Keyword(s):  
Mineral Resource ◽  
Oil And Gas ◽  
Komi Republic ◽  
Transport Infrastructure ◽  
The Arctic ◽  
Western Slope ◽  
Resource Base ◽  
Sea Transport ◽  
Coking Coal ◽  
Coal Deposits

The analysis of the state and prospects for the development of the mineral resource base of the Vorkuta region of the Komi Republic, belonging to the Arctic zone, was carried out. It is shown that the coking coal deposits of the Pechora basin, the development of which is the basis for the existence of the city of Vorkuta, were and still are the most impor-tant ones. The reserves of coking coal are significant, however, the supply of them to operating mining enterprises is becoming more and more limited. To maintain and develop coal mining, it is necessary to build new mines. Along with the coal deposits, the Vorkuta region is of great interest in relation to other minerals. In the Kosyu-Rogovsk and Koro-taikha depressions, there are potential oil and gas-bearing structures, on the western slope of the Polar Urals – barite deposits, gold, chromium and copper occurrences, deserving further geological study and prospecting works. For a more complete disclosure and development of the mineral resource potential of the Vorkuta region, the extension of transport infrastructure is of great importance. The implementation of plans for the construction of railways, access to the Northern Sea Route, can contribute, in particular, to increasing the volume of coal production and wider supplies of coal using sea transport, and raising the investment attractiveness of the Arctic territories.

Comparison of Wind Tunnel Airfoil Performance Data With Wind Turbine Blade Data

1992 ◽  
Vol 114 (2) ◽  
pp. 119-124 ◽  
Author(s):  
C. P. Butterfield ◽  
George Scott ◽  
Walt Musial
Keyword(s):  
Wind Tunnel ◽  
Wind Turbine ◽  
Peak Power ◽  
Unsteady Aerodynamics ◽  
Leading Edge ◽  
Operating Conditions ◽  
Performance Data ◽  
Horizontal Axis Wind Turbine ◽  
Force Coefficients ◽  
Basic Fluid

Horizontal axis wind turbine (HAWT) performance is usually predicted by using wind tunnel airfoil performance data in a blade element momentum theory analysis. This analysis assumes that the rotating blade airfoils will perform as they do in the wind tunnel. However, when stall-regulated HAWT performance is measured in full-scale operation, it is common to find that peak power levels are significantly greater than those predicted. Pitch-controlled rotors experience predictable peak power levels because they do not rely on stall to regulate peak power. This has led to empirical corrections to the stall predictions. Viterna and Corrigan (1981) proposed the most popular version of this correction. But very little insight has been gained into the basic cause of this discrepancy. The National Renewable Energy Laboratory (NREL), funded by the DOE, has conducted the first phase of an experiment which is focused on understanding the basic fluid mechanics of HAWT aerodynamics. Results to date have shown that unsteady aerodynamics exist during all operating conditions and dynamic stall can exist for high yaw angle operation. Stall hysteresis occurs for even small yaw angles and delayed stall is a very persistent reality in all operating conditions. Delayed stall is indicated by a leading edge suction peak which remains attached through angles of attack (AOA) up to 30 degrees. Wind tunnel results show this peak separating from the leading edge at 18 deg AOA. The effect of this anomaly is to raise normal force coefficients and tangent force coefficients for high AOA. Increased tangent forces will directly affect HAWT performance in high wind speed operation. This report describes pressure distribution data resulting from both wind tunnel and HAWT tests. A method of bins is used to average the HAWT data which is compared to the wind tunnel data. The analysis technique and the test set-up for each test are described.

scholarly journals Sea-ice induced growth decline in Arctic shrubs

2017 ◽  
Vol 13 (8) ◽  
pp. 20170122 ◽  
Author(s):  
Mads Forchhammer
Keyword(s):  
Sea Ice ◽  
Ring Width ◽  
Plant Productivity ◽  
Climatic Conditions ◽  
Arctic Sea Ice ◽  
Annual Growth ◽  
The Arctic ◽  
Growth Time ◽  
Sea Ice Extent ◽  
Negative Effect

Measures of increased tundra plant productivity have been associated with the accelerating retreat of the Arctic sea-ice. Emerging studies document opposite effects, advocating for a more complex relationship between the shrinking sea-ice and terrestrial plant productivity. I introduce an autoregressive plant growth model integrating effects of biological and climatic conditions for analysing individual ring-width growth time series. Using 128 specimens of Salix arctica , S. glauca and Betula nana sampled across Greenland to Svalbard, an overall negative effect of the retreating June sea-ice extent was found on the annual growth. The negative effect of the retreating June sea-ice was observed for younger individuals with large annual growth allocations and with little or no trade-off between previous and current year's growth.

scholarly journals Sodankylä manual snow survey program

2016 ◽  
Vol 5 (1) ◽  
pp. 163-179 ◽  
Author(s):  
Leena Leppänen ◽  
Anna Kontu ◽  
Henna-Reetta Hannula ◽  
Heidi Sjöblom ◽  
Jouni Pulliainen
Keyword(s):  
Snow Water Equivalent ◽  
Measurement Techniques ◽  
Liquid Water Content ◽  
The Arctic ◽  
Research Centre ◽  
Future Research ◽  
Forest Zone ◽  
Finnish Meteorological Institute ◽  
Snow Properties ◽  
Snow Water

Abstract. The manual snow survey program of the Arctic Research Centre of the Finnish Meteorological Institute (FMI-ARC) consists of numerous observations of natural seasonal taiga snowpack in Sodankylä, northern Finland. The easily accessible measurement areas represent the typical forest and soil types in the boreal forest zone. Systematic snow measurements began in 1909 with snow depth (HS) and snow water equivalent (SWE). In 2006 the manual snow survey program expanded to cover snow macro- and microstructure from regular snow pits at several sites using both traditional and novel measurement techniques. Present-day snow pit measurements include observations of HS, SWE, temperature, density, stratigraphy, grain size, specific surface area (SSA) and liquid water content (LWC). Regular snow pit measurements are performed weekly during the snow season. Extensive time series of manual snow measurements are important for the monitoring of temporal and spatial changes in seasonal snowpack. This snow survey program is an excellent base for the future research of snow properties.

scholarly journals Amplified bioproductivity during Transition IV (332 000–342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn

2013 ◽  
Vol 9 (2) ◽  
pp. 679-686 ◽  
Author(s):  
L. Cunningham ◽  
H. Vogel ◽  
V. Wennrich ◽  
O. Juschus ◽  
N. Nowaczyk ◽  
...  
Keyword(s):  
Sharp Increase ◽  
Biogenic Silica ◽  
Ice Cores ◽  
Climatic Conditions ◽  
The Arctic ◽  
Significant Shift ◽  
Geochemical Parameters ◽  
Lake El’Gygytgyn ◽  
Arctic Russia

Abstract. To date, terrestrial archives of long-term climatic change within the Arctic have widely been restricted to ice cores from Greenland and, more recently, sediments from Lake El'gygytgyn in northeast Arctic Russia. Sediments from this lake contain a paleoclimate record of glacial-interglacial cycles during the last three million years. Low-resolution studies at this lake have suggested that changes observed during Transition IV (the transition from marine isotope stage (MIS) 10 to MIS 9) are of greater amplitude than any observed since. In this study, geochemical parameters are used to infer past climatic conditions thus providing the first high-resolution analyses of Transition IV from a terrestrial Arctic setting. These results demonstrate that a significant shift in climate was subsequently followed by a rapid increase in biogenic silica (BSi) production. Following this sharp increase, bioproductivity remained high, but variable, for over a thousand years. This study reveals differences in the timing and magnitude of change within the ratio of silica to titanium (Si/Ti) and BSi records that would not be apparent in lower resolution studies. This has significant implications for the increasingly common use of Si/Ti data as an alternative to traditional BSi measurements.

Sign in / Sign up

Export Citation Format

Share Document