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Jayson Craig Small and Liwei Zhang
The performance of detonation engines depends on propellant injectors. This study investigates a fluidic-valve injector mounted to a detonation tube. The injector is equipped with a recessed cavity connecting to the fuel plenum. After verifying the theor...
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Chengxiang Zhu, Jingxin Wang, Qingyong Bian, Chunyang Liu, Ning Zhao and Chunling Zhu
Ice accretion on the inner surface of a fuel tube can fall off and potentially block the filters and small orifices, which thereby restricts the fuel flow to the engines during the long flying of the aircraft in cold conditions. This might cause the engi...
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Yang Liu, Xintong Li, Pengcheng Wang, Xiaotian Zhang, Hao Zhu and Guobiao Cai
This paper proposed a multi-objective, multi-disciplinary design optimization and multi-attribute evaluation method for the manned lunar lander descent stage. A system design model is established considering multiple disciplines such as propulsion, struc...
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Giuseppe Palaia, Karim Abu Salem and Alessandro A. Quarta
The continuously expanding transport aviation sector has a significant impact on climate change, and measures must be taken to limit its environmental impact. The study of advanced airframes, which may increase the lift-to-drag ratio and structural effic...
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Karim Abu Salem, Giuseppe Palaia and Alessandro Antonio Quarta
The combination of new airframes with electric and hybrid-electric propulsion is a potential solution to decarbonize aviation. In this context, recent studies have proven that the box-wing airframe, if integrated on a hybrid-electric aircraft belonging t...
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Vincent Domogalla, Lothar Bertsch, Martin Plohr, Eike Stumpf and Zoltán S. Spakovszky
Promising low-noise aircraft architectures have been identified over the last few years at DLR. A set of DLR aircraft concepts was selected for further assessment in the context of sustainable and energy-efficient aviation and was established at the TU B...
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Adil Al-Falahi, Falah Alobaid and Bernd Epple
Absorption refrigeration cycle is considered a vital option for thermal cooling processes. Designing new systems is needed to meet the increasing communities? demands of space cooling. This should be given more attention especially with the increasing co...
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Bach Phi Duong, Jaeyoung Kim, Cheol-Hong Kim and Jong-Myon Kim
Advances in technology have enhanced the ability to detect leakages in boiler tube components in thermal power plants. As a specific issue, the interaction between the coal fuel stream and the boiler tube membrane generates random and high-amplitude impu...
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Muhammad Sohaib and Jong-Myon Kim
Boiler heat exchange in thermal power plants involves tubes to transfer heat from the fuel to the water. Boiler tube leakage can cause outages and huge power generation loss. Therefore, early detection of leaks in boiler tubes is necessary to avoid such ...
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Efthimios G. Pariotis, Theodoros C. Zannis and John S. Katsanis
The present study describes a model-based approach for the assessment of central cooling retrofit solutions using variable speed drive (VSD) seawater (SW) pumps in marine applications. There are two main innovative features of the proposed methodology. T...
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