scholarly journals The Role of CFD in Modern Jet Engine Combustor Design

2020 ◽  
Author(s):  
Zhi X. Chen ◽  
Ivan Langella ◽  
Nedunchezhian Swaminathan
Keyword(s):  
Jet Engine

Global Needs for Jet-Engine-Steered (JES) Strike Drones vs. Lack of Updated Textbooks to Design 6th Generation UCLASS Due to UCAV Failure

2015 ◽  
Vol 32 (3) ◽  
Author(s):  
Benjamin Gal-Or
Keyword(s):  
Low Cost ◽  
Jet Engine ◽  
Main Text ◽  
Unmanned Combat Air Vehicles ◽  
Operational Modes ◽  
Air Vehicles

AbstractGlobal fight against terror, and the rapidly changing geopolitical situations, raise hot debates on urgently needed new designs and operational modes of efficient, low-cost, Jet-Engine-Steered (JES) strike drones, and about the expected roles of future UCLASS (Unmanned, Carrier-Launched, Surveillance & Strike), while current UCAV (Unmanned Combat Air Vehicles) have failed to perform the needed strike missions. The role of the jet-engine community in this rapidly unfolding geopolitical situation is reviewed in the main text and in the Appendix.

scholarly journals Avian Avoidance and Aviation

2014 ◽  
Vol 136 (02) ◽  
pp. 50-54
Author(s):  
Lee S. Langston
Keyword(s):  
San Antonio ◽  
Safety Engineering ◽  
Bird Strike ◽  
Jet Engine ◽  
Equipment Manufacturer ◽  
Current State ◽  
The World ◽  
International Body ◽  
Fourth Member

This article presents an overview of the current state of dealing with jet engine bird ingestion. At Turbo Expo ‘13 in San Antonio, Dr. Aspi Wadia of GE Aviation and Dr. Lee S. Langston (author of this paper) co-chaired a three-hour panel, ‘Jet Engine Bird Ingestion – Current Issues and Ways Forward.’ The leadoff panelist was Capt. Paul Eschenfelder, a retired Delta Airlines pilot, now with Embry-Riddle Aeronautical University, who gave an overall review of recent bird strike accidents around the world. Panelist John Dalton, who is a Technical Fellow in Airplane Safety Engineering for Boeing, gave the airframe original equipment manufacturer (OEM) history and his views on the bird strike problem. The panel’s fourth member was Dr. Nicholas Carter who is the Director of Finance for the World Birdstrike Association (WBA). Carter explained the role of the WBA, which is the international body that represents all states and countries in issues related to bird hazards at airfields and airports.

Inverted Turbo-Jet Engine for Hypersonic Propulsion

2005 ◽  
Author(s):  
Yoshiharu Tsujikawa ◽  
Ken-Ichi Kaneko ◽  
Shusuke Tokumoto
Keyword(s):  
High Energy ◽  
Brayton Cycle ◽  
Jet Engine ◽  
Hypersonic Propulsion ◽  
The Core ◽  
Mode Of Operation ◽  
High Energy Efficiency ◽  
Engine Components ◽  
Power Generation Systems

This paper concerns to the inverted turbo-jet engine intended for operation in the range of Mach numbers from 0 to 6. In the present engine configuration, which is based on the inverted Brayton cycle, the sequence of the core-engine components was arranged in the order: turbine - heat exchanger - compressor - combustor. It should also be noted that the inverted Brayton cycle has also been considered for application to stationary power generation systems in the role of a bottoming cycle. An improved version of the inverted turbo-jet engine (ITE), has also been proposed in the present paper, incorporates an additional combustor installed between the inlet and the turbine. At low speeds this additional burner allows a heat input upstream of the initial turbine to augment thrust. The fuel-rich mode of operation is expected to be beneficial, as speed increases. In summary, the inverted turbojet engine can produce sufficient thrust compared to another engine concepts and it reveals high energy efficiency over the wide speed of range.

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor

Role of the allergist in diagnosis and management of patients with uveitis

JAMA ◽  
1966 ◽  
Vol 195 (3) ◽  
pp. 167-172 ◽  
Author(s):  
T. E. Van Metre
Keyword(s):  
Diagnosis And Management

The power of norms to sway fused group members

2018 ◽  
Vol 41 ◽  
Author(s):  
Winnifred R. Louis ◽  
Craig McGarty ◽  
Emma F. Thomas ◽  
Catherine E. Amiot ◽  
Fathali M. Moghaddam
Keyword(s):  
Evolutionary Anthropology ◽  
Normative Systems ◽  
Violent Extremism ◽  
Identity Fusion ◽  
Group Members

AbstractWhitehouse adapts insights from evolutionary anthropology to interpret extreme self-sacrifice through the concept of identity fusion. The model neglects the role of normative systems in shaping behaviors, especially in relation to violent extremism. In peaceful groups, increasing fusion will actually decrease extremism. Groups collectively appraise threats and opportunities, actively debate action options, and rarely choose violence toward self or others.

Elaborating the role of reflection and individual differences in the study of folk-economic beliefs

2018 ◽  
Vol 41 ◽  
Author(s):  
Kevin Arceneaux
Keyword(s):  
Decision Making ◽  
Individual Differences ◽  
Cognitive Processes ◽  
Evolutionary History ◽  
Behavioral Responses ◽  
History Of ◽  
Economic Beliefs

AbstractIntuitions guide decision-making, and looking to the evolutionary history of humans illuminates why some behavioral responses are more intuitive than others. Yet a place remains for cognitive processes to second-guess intuitive responses – that is, to be reflective – and individual differences abound in automatic, intuitive processing as well.

The role of affect in feelings of obligation

2020 ◽  
Vol 43 ◽  
Author(s):  
Stefen Beeler-Duden ◽  
Meltem Yucel ◽  
Amrisha Vaish
Keyword(s):  
Positive Emotions ◽  
The Creation ◽  
Sense Of Obligation

Abstract Tomasello offers a compelling account of the emergence of humans’ sense of obligation. We suggest that more needs to be said about the role of affect in the creation of obligations. We also argue that positive emotions such as gratitude evolved to encourage individuals to fulfill cooperative obligations without the negative quality that Tomasello proposes is inherent in obligations.

Refining our understanding of the “elephant in the room”

2020 ◽  
Vol 43 ◽  
Author(s):  
Andrew Whiten
Keyword(s):  
Social Cognition ◽  
Cultural Evolution ◽  
Cognitive Abilities ◽  
Critical Factors ◽  
Technological Culture

Abstract The authors do the field of cultural evolution a service by exploring the role of non-social cognition in human cumulative technological culture, truly neglected in comparison with socio-cognitive abilities frequently assumed to be the primary drivers. Some specifics of their delineation of the critical factors are problematic, however. I highlight recent chimpanzee–human comparative findings that should help refine such analyses.

Choosing a Markov blanket

2020 ◽  
Vol 43 ◽  
Author(s):  
Thomas Parr
Keyword(s):  
Markov Blanket ◽  
Target Article ◽  
The Relationship

Abstract This commentary focuses upon the relationship between two themes in the target article: the ways in which a Markov blanket may be defined and the role of precision and salience in mediating the interactions between what is internal and external to a system. These each rest upon the different perspectives we might take while “choosing” a Markov blanket.

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