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Michael Flouros, Francois Cottier, Markus Hirschmann and Christina Salpingidou
Seals are considered one of the most important flow elements in turbomachinery applications. The most traditional and widely known seal is the labyrinth seal but in recent years other types like the brush or carbon seals were introduced since they consid...
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Oliver Munz, Tim Pychynski, Corina Schwitzke and Hans-Jörg Bauer
Labyrinth seals are a state-of-the-art sealing technology to prevent and control leakage flows at rotor–stator interfaces in turbomachinery. Higher pressure ratios and the economical use of cooling air require small clearances, which lead to potent...
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Michael Flouros, Francois Cottier, Markus Hirschmann and Christina Salpingidou
Seals are considered one of the most important flow elements in turbomachinery applications. The most traditional and widely known seal is the labyrinth seal but in recent years other types like the brush or carbon seals were introduced since they consid...
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Oliver Munz, Tim Pychynski, Corina Schwitzke and Hans-Jörg Bauer
Labyrinth seals are a state-of-the-art sealing technology to prevent and control leakage flows at rotor?stator interfaces in turbomachinery. Higher pressure ratios and the economical use of cooling air require small clearances, which lead to potential ru...
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Jian He, Xiang Luo, Yang Bai, An Song and Tao Yang
In aero-engines, a secondary air system is used to cool the rotor discs and seal cavities between rotor and stator parts. The pressure loss caused by bleed air can be effectively reduced by setting the finned vortex reducer. Thus, the bleed system design...
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Heejung Kim, Jong-Koo Mok, Youngyun Park, Dugin Kaown and Kang-Kun Lee
The geothermal energy of groundwater has aroused increasing interest as a solution to climate change. The groundwater heat pumps (GWHP) system using groundwater is the most environmentally friendly system to date and has been examined in several studies....
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Qingzhu Wan, Yuan Bian and Yalan Chen
With the proportion of air conditioners increasing gradually, they can provide a certain amount of frequency-controlled reserves for a micro-grid. Optimizing utilization of air conditioners and considering load response characteristics and customer comfo...
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Jie Wang, Peng Liu, Tian Qiu and Shuiting Ding
As a typical flow element in an aero-engines, orifices play a vital role in the distribution and control of the mass flow rate within the secondary air system. In particular, rotating orifices with complex geometry (Euler angles) may significantly vary t...
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Oliver Ohneiser, Hartmut Helmke, Shruthi Shetty, Matthias Kleinert, Heiko Ehr, Sebastian Schier-Morgenthal, Saeed Sarfjoo, Petr Motlicek, ?arunas Murauskas, Tomas Pagirys, Haris Usanovic, Mirta Me?trovic and Aneta Cerná
Assistant Based Speech Recognition (ABSR) systems for air traffic control radiotelephony communication have shown their potential to reduce air traffic controllers? (ATCos) workload. Related research activities mainly focused on utterances for approach a...
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Edwin Rizki Safitra, Dwi Cahyani, Idra Herlina
Pág. 12 - 15
Corrosion is one of the unavoidable problems in nuclear reactor cooling systems that use water as a cooling medium. secondary cooling systemThe Reaktor Serba Guna?G.A. Siwabessy (RSG-GAS) is an open recirculation cooling system that uses carbon steel pip...
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Edwin Rizki Safitra, Dwi Cahyani, Idra Herlina
Pág. 12 - 15
Corrosion is one of the unavoidable problems in nuclear reactor cooling systems that use water as a cooling medium. secondary cooling systemThe Reaktor Serba Guna?G.A. Siwabessy (RSG-GAS) is an open recirculation cooling system that uses carbon steel pip...
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Nima Bolouki, Wen-Hui Kuan, Yu-Yun Huang and Jang-Hsing Hsieh
A non-thermal plasma-water system using a microsecond pulsed high-voltage power supply was investigated with air, nitrogen, oxygen, and argon gas feedings individually. Optical emission spectroscopy (OES) was utilized to characterize the primary active s...
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Hsien Hua Lee, Guan-Fu Chen and Hsiang-Yu Hsieh
This study is focused on the wave energy converter of an oscillating water column (OWC) system that is integrated with a jacket type infrastructure applied for an offshore wind turbine system. In this way, electricity generation by both wind power and wa...
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Liang Zhou, Weiqiang Xu, Chengqun Wang and Hsiao-Hwa Chen
Due to its flexible deployment and high mobility of unmanned aerial vehicles (UAVs), the UAV-assisted cognitive radio (CR) network has attracted a lot of attention as one of the most promising techniques to address spectrum congestion issues in futuristi...
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He Li, Xiaodong Wang, Jiuxin Ning, Pengfei Zhang and Hailong Huang
This paper investigated the effect of air leaking into the working fluid on the performance of a steam ejector. A simulation of the mixing of air into the primary and secondary fluids was performed using CFD. The effects of air with a 0, 0.1, 0.3 and 0.5...
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Ermioni Dimitropoulou, Vasiliki D. Assimakopoulos, Kyriaki M. Fameli, Helena A. Flocas, Panagiotis Kosmopoulos, Stelios Kazadzis, Kostas Lagouvardos and Elizabeth Bossioli
Biogenic emissions affect the urban air quality as they are ozone and secondary organic aerosol (SOA) precursors and should be taken into account when applying photochemical pollution models. The present study presents an estimation of the magnitude of n...
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Sergejus Lebedevas and Tomas Cepaitis
The decarbonization problem of maritime transport and new restrictions on CO2 emissions (MARPOL Annex VI Chapter 4, COM (2021)562) have prompted the development and practical implementation of new decarbonization solutions. One of them, along with the us...
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Yiming Mo, Lei Wang, Wenqing Hong, Congzhen Chu, Peigen Li and Haiting Xia
The intrusion of foreign objects on airport runways during aircraft takeoff and landing poses a significant safety threat to air transportation. Small-scale Foreign Object Debris (FOD) cannot be ruled out on time by traditional manual inspection, and the...
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Nils Ahrenhold, Hartmut Helmke, Thorsten Mühlhausen, Oliver Ohneiser, Matthias Kleinert, Heiko Ehr, Lucas Klamert and Juan Zuluaga-Gómez
Automatic speech recognition and understanding (ASRU) for air traffic control (ATC) has been investigated in different ATC environments and applications. The objective of this study was to quantify the effect of ASRU support for air traffic controllers (...
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Yingzhe Zhang, Baohong Bai, Dakai Lin and Peiqing Liu
The flap side-edge is a vital contributor to airframe noise. In this study, we propose a novel flap side-edge noise reduction method based on the concept of active blowing air. A long slot is opened from the flap?s lower surface to the tip surface to ind...
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