5,949 research outputs found

    Microfog lubricant application system for advanced turbine engine components, phase 2. Tasks 3, 4 and 5: Wettability and heat transfer of microfog jets impinging on a heated rotating disc, and evaluation of reclassifying nozzles and a vortex mist generator

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    The wettabilities and heat transfer rates of microfog jets (oil-mist nozzle flows) impinging on a heated rotating disc were determined under an inert atmosphere of nitrogen at temperatures ranging from 600 to 800 F. The results are discussed in relation to the various factors involved in the microfog lubricant application systems. Two novel reclassifying nozzles and a vortex mist generator were also studied

    Microfog lubricant application system for advanced turbine engine components, phase 3

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    The wetting characteristics and deposit forming tendencies of a series of lubricants were evaluated using a microfog jet delivery system to wet a flat heated rotating disc. The performances of the nine lubricants are discussed in terms of the various testing parameters which include temperature, disc speed and lubricant gas flow rates. Also discussed are the heat transfer characteristics of two of the lubricants on that same plane disc specimen. The wetting characteristics and heat transfer characteristics of one of the lubricants on a complex disc simulating bearing geometry are also discussed

    Agile Gnewt Cargo: parcels deliveries with electric vehicles in Central London Multi-carrier central London micro-consolidation and final delivery via low carbon vehicles. Data Report

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    This dataset contains the results of the first Agile Urban Logistics trials that were funded by the Mayor of London and delivered by Gnewt Cargo in partnership with the University of Westminster. The Agile Urban Logistics project was delivered under the Mayor’s Smart London Demonstrator programme. The aim was to trial innovative solutions for the light freight sector that allows it to adapt to changing regulatory and market conditions, mitigating congestion and emissions impacts. The three trials were: Agile 1: Multi-carrier consolidation trial In the Agile Gnewt Cargo trial, the demonstrator carried parcels for final delivery in central London for several major parcels businesses (namely Hermes, TNT and DX, all of which are active in business-to-consumer (B2C), home deliveries, and business-to-business (B2B) operations in London and the UK). The area covered focuses around the London Congestion charge area with a keen focus on the west side of this highly polluted region

    IT solutions for parcel deliveries with electric vehicles in Central London - Technology-based solution to facilitate efficient allocation and cross-carrier routing. Data Report

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    This data report contains the results of the second set of Agile Urban Logistics trials that were funded by the Mayor of London and delivered 2015 to 2017 by Gnewt Cargo in partnership with the University of Westminster. The Agile Urban Logistics project was delivered under the Mayor’s Smart London Demonstrator programme. The aim was to trial innovative solutions for the light freight sector that allows it to adapt to changing regulatory and market conditions, mitigating congestion and emissions impacts. Agile 2: IT solutions for parcel deliveries trial The trial was designed to test a range of IT solutions for electric fleet management, improving efficient client communication management and routing and planning systems

    Parcel deliveries with electric vehicles in Central London - Category 3: Single carrier consolidation centre targeting poor air quality zones enabling manual delivery methods. Data Report

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    This Data Report contains the data of the third set of Agile Urban Logistics trials that were funded by the Mayor of London and delivered by Gnewt Cargo in partnership with the University of Westminster in 2015 to 2017. The Agile Urban Logistics project was delivered under the Mayor’s Smart London Demonstrator programme. The aim was to trial innovative solutions for the light freight sector that allows it to adapt to changing regulatory and market conditions, mitigating congestion and emissions impacts. Agile 3: Single-carrier consolidation trial The trial explored scenarios for consolidating deliveries of multiple retail and non- retail clients using a single carrier (Gnewt Cargo) in a single van. All deliveries were done using electric vans. The aim of the trial was to reduce the number of delivery trips, reduce congestion and improve air quality outputs compared to a diesel equivalent approach by utilizing zero emissions electric freight delivery vehicles

    Dependence of the drag over super hydrophobic and liquid infused surfaces on the textured surface and Weber number

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    Direct Numerical Simulations of a turbulent channel flow have been performed. The lower wall of the channel is made of staggered cubes with a second fluid locked in the cavities. Two viscosity ratios have been considered, m=μ1/μ2=0.02 and 0.4 (the subscript 1 indicates the fluid in the cavities and 2 the overlying fluid) mimicking the viscosity ratio in super–hydrophobic surfaces (SHS) and liquid infused surfaces (LIS) respectively. A first set of simulations with a slippery interface has been performed and results agree well with those in literature for perfect slip conditions and Stokes approximations. To assess how the dynamics of the interface affects the drag, a second set of DNS has been carried out at We=40 and 400 corresponding to We+≃10−3 and 10−2. The deformation of the interface is fully coupled to the Navier-Stokes equation and tracked in time using a Level Set Method. Two gas fractions, GF=0.5 and 0.875, have been considered to assess how the spacing between the cubes affects the deformation of the interface and therefore the drag. For the dimensions of the substrate here considered, under the ideal assumption of flat interface, staggered cubes with GF=0.875 provide about 20% drag reduction for We=0. However, a rapid degradation of the performances is observed when the dynamics of the interface is considered, and the same geometry increases the drag of about 40% with respect to a smooth wall. On the other hand, the detrimental effect of the dynamics of the interface is much weaker for GF=0.5 because of the reduced pitch between the cubes

    Developing an evaluation framework for innovative urban and interurban freight transport solutions

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    This paper presents work carried out in the projects STRAIGHTSOL and SMARTFUSION, both funded within the seventh framework programme of the European Commission. Both projects develop and apply an evaluation framework to assess innovative urban and interurban freight transport solutions. The frameworks will be generic and applicable to any measure within the urban-interurban context and across regions in Europe. To reach that goal, the two projects work together on improvements. This paper discusses their common challenges, approaches, provisional outcomes and differences. Next it looks at the lessons that can be learned from each other

    Assessment of roll-out potential of CITYLAB solutions to other CITYLAB living labs

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    This report analyses to what extent the seven CITYLAB implementations may be successfully transferred from their original implementation city to other CITYLAB cities. CITYLAB supports seven Living Labs where innovative urban freight measures are implemented, analysed and rolled out. The focus of this report is to clarify ‘if’ and ‘how’ the seven implementations can be transferred and scaled to the other CITYLAB cities. The CITYLAB cities will learn, from this report, which implementations may be transferred to their own context. Furthermore, they will gain understanding in possibilities to improve the conditions for better chances of a successful transfer of CITYLAB implementations. The transferability methodology adopted in TIDE has been taken as the basis for the CITYLAB methodology as it is the most developed and most relevant to CITYLAB. An appropriate adjustment of the TIDE methodology was necessary as, on the one hand, TIDE examined the transferability of measures in general, while CITYLAB analyses the transferability of applied measures to specific cities. On the other hand, TIDE analysed innovative urban transport and mobility concepts whereas CITYLAB is dealing with the implementation of innovative logistics solutions. The seven consecutive steps of the CITYLAB transferability analysis are: STEP 1: Implementation statement/objectives and scoping STEP 2: Clarification of the impacts of the implementation STEP 3: Identification of upscaling/downscaling needs of implementations STEP 4: Identification of success factors of implementations STEP 5: Identification of the level of importance of success factors STEP 6: Assessment of success factors in the context of adopter city STEP 7: Conclusions on the transferability of implementations The summarized results of the CITYLAB transferability analysis are shown in the chart overview. The ranking shows for each implementation in which CITYLAB city the chance for successful transfer is the best
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