scholarly journals Mathematical model for the preliminary analysis of dual-mode space nuclear fission solid core power and propulsion systems, NUROC3A. AMS report No. 1239a

1976 ◽  
Author(s):  
J. Grey ◽  
S. Chow
Keyword(s):  
Mathematical Model ◽  
Preliminary Analysis ◽  
Nuclear Fission ◽  
Solid Core ◽  
Dual Mode ◽  
Propulsion Systems ◽  
Mode Space

scholarly journals PENGARUH TINGKAT PENDAPATAN DAN KEPUASAN MENERIMA BEASISWA TERHADAP KEBAHAGIAAN PSIKOLOGIS MAHASISWA PROGRAM DUAL MODE SYSTEM DI STAI STAISTAI STAI PATI TAHUN 2013

2016 ◽  
Vol 1 (1) ◽  
pp. 59
Author(s):  
Ahmad Fatah
Keyword(s):  
Hypothesis Testing ◽  
Multiple Regression ◽  
Significant Relationship ◽  
Preliminary Analysis ◽  
Income Level ◽  
Quantitative Approach ◽  
Dual Mode ◽  
Study Population

<p><span>Abstract</span></p><p><span>This study aims to determine the effect of the level of income and satisfaction<br /><span>received scholarships to students of the psychological happiness Dual Mode<br /><span>System at the Islamic Institute of Pati in 2013, using a quantitative approach<br /><span>with three variables: the level of income, the satisfaction of receiving a scholarship and psychological happiness. The study population was all students of the <span>Dual Mode System totaling 117 students. Samples authors take 25% of polulasi, <span>as many as 30 students. Analysis of this study using multiple regression with <span>three steps: a preliminary analysis, hypothesis testing and analysis of further <span>analysis. Results of this study was no effect of income level (X1) with psychological happiness (Y) student Dual Mode System in STAI Starch 2013. Thus the <span>first hypothesis which says "There is a significant relationship between the <span>income level of students to students of the psychological happiness Dual Mode <span>system in sTAI Pati "is rejected. There is an effect of satisfaction received <span>scholarships (X2) with psychological happiness (Y) student Dual Mode System <span>in 2013. So STAI Pati second hypothesis ie "There is significant relationship <span>between satisfaction received scholarships to students of the psychological <span>happiness Dual Mode System in STAI Starch" accepted as true. The effect was <span>of 18.3%, and the remaining 81.7% is influenced by other variables that have <span>not been examined by the authors. No effect of income level (X1) and the <span>satisfaction of receiving a scholarship (X2) with psychological happiness (Y) <span>student Dual Mode System in 2013. So STAI Pati third hypothesis that "There <span>is significant relationship between the level of income and satisfaction received a <span>scholarship to happiness psychological student Dual Mode System d sTAI <span>Starch "rejected.</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></p><p><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><span><br /><span><strong>Keywoard:</strong> <em>tingkat pendapatan, kepuasan menerima beasiswa, kebahagiaan</em><br /><em>psikologis</em></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><br /></span></p>

MATHEMATICAL MODELING OF SUPERSONICMIXING AND COMBUSTION IN NEAR-WALL REGION

2020 ◽  
Author(s):  
R. S. SOLOMATIN ◽  
◽  
I. V. SEMENOV ◽  
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
High Speed ◽  
Supersonic Flows ◽  
Computational Algorithms ◽  
Wall Region ◽  
Propulsion Systems ◽  
Supersonic Mixing ◽  
Near Wall

Investigation of mixing and burning processes in supersonic flows is one of the key trends in construction of effective engines for high-speed propulsion systems. Current research is devoted to development of mathematical model and computational algorithms of supersonic mixing and combustion.

Data-Driven Real-Time Decision Support and its Application to Hybrid Propulsion Systems

2017 ◽  
Author(s):  
Karl-Johan Reite ◽  
Jarle Ladstein ◽  
Joakim Haugen
Keyword(s):  
Mathematical Model ◽  
Decision Support ◽  
Real Time ◽  
Data Driven ◽  
Local Minima ◽  
Propulsion Systems ◽  
Hybrid Propulsion ◽  
Fishing Vessels ◽  
Main Engine ◽  
Fuel Consumption And Emissions

This paper describes a method for providing real time decision support based on measurements rather than optimizing a mathematical model. The proposed method is thus beneficial for systems for which the modelling would be inaccurate, the dynamics and complexity of the system would make it difficult to optimize in real time, or the risk of returning local minima is not acceptable. The proposed method is implemented on four fishing vessels. These vessels are complex and give the skipper many choices related to how the vessel is operated. The developed tool advises the crew on in real time on operational decisions, particularly on the use of various diesel electric and diesel mechanic propulsion modes, including decisions such as the use use of shaft generator, direct coupling between main engine and propeller or not, propeller pitch, etc. This will presumably reduce both fuel consumption and emissions of CO2 and NOX. Some examples of obtainable results from both onshore analyses and the onboard application are presented to demonstrate the methods applicability.

scholarly journals Modelling of a Dual-Fuel-Mode Free-Jet Combustion System

Aerospace ◽  
2019 ◽  
Vol 6 (12) ◽  
pp. 135
Author(s):  
Maxim Cooper ◽  
Ashish Alex Sam ◽  
Apostolos Pesyridis
Keyword(s):  
Combustion Chamber ◽  
Primary Objective ◽  
Future Research ◽  
Combustion System ◽  
Commercial Aircraft ◽  
Dual Mode ◽  
Propulsion Systems ◽  
Hypersonic Propulsion ◽  
Free Jet ◽  
Chamber Design

The focus of this study is to design a combustion system able to sustain hypersonic flight at Mach 8. A Dual-Mode Free-Jet combustion chamber design, first tested in 2010 by NASA, is being adapted to run on hydrogen fuel instead of ethylene while addressing the excessive thermal heat load. This study is part of the FAME (Flight at Mach Eight) project, with the primary objective to design and analyse the engine configuration for a hypersonic commercial aircraft. This CFD analysis and validation study, the first to replicate this combustion chamber design, provides detailed instructions on the combustion system design. The analysis from this study can be used for future research to successfully reach a sustainable design and operation of a Dual-Mode Free-Jet combustion chamber. The 53% size reduction in the combustion system represents significant progress which encourages future research regarding in the design of combustion systems for hypersonic propulsion systems.

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