4,437 research outputs found
Development of a rotor model for the numerical simulation of helicopter exterior flow-fields
No full textIncludes bibliographical references (leaves 84-85).A numerical methodology is developed to model the effect of a rotor on the surrounding flow-field. The model calculates the time-averaged aerodynamic forces exerted on the air by the fan blades within the blade-swept region, and permits the user to specify blade properties such as cross-sectional profile and orientation at a particular radial and azimuthal location. The calculated forces are included as source terms within the Reynolds-averaged Navier-Stokes equations for an incompressible fluid, which are solved by the commercial CFD solver, FLUENT. The effects of turbulence are incorporated through the use of Launder and Spalding's k-g turbulence model. This method is selected as being the most efficient use of the resources available, giving the economic advantages of a steady simulation, while allowing radial and azimuthal variations of rotor characteristics. In order to validate the accuracy of the numerical model for both aligned and non-aligned inflow conditions, results are compared with experimental data reported for an axial flow fan. Agreement between experimental and numerical results is excellent to good. Fan static pressure rise is closely predicted by the numerical solution, while fan power consumption and fan static efficiency are under and over-predicted respectively. This error may be attributed to frictional losses not accounted for in the numerical model. These include physical rotational instabilities, leading to increased mechanical losses, and tip effects due to the clearance between the fan blade tips and the fan casing. Trends are nevertheless consistently predicted by the numerical model for inflow angles up to 45°, and for the range of blade pitch settings used. The adverse effect of off-axis inflow on the fan static pressure rise is numerically predicted, while fan power consumption is found to remain independent of inflow angle, as had been experimentally observed. The rotor model is finally integrated with the fuselage of the CIRSTEL (Combined Infra-Red Suppression and Tail rotor Elimination) prototype in an analysis of the helicopter exterior flow-field. No experimental data for this configuration was available for validation purposes. However, the model is used in the simulation of several common helicopter flight conditions. Results are presented graphically, and generally indicate good agreement with physically observed phenomena
Presumpscot Fm. unconformably overlying submarine fan, Pittston
No full text2-O-15. Gardiner(15\u27)-EC-80-11. Presumpscot Fm. unconformably overlying submarine fan, Williams Pit, Kennebec valley, Pittston. With Carolyn Lepage. Project Name: Thompson NGGDPP Grant 2020https://digitalmaine.com/mgs_geologic_field_photos/16312/thumbnail.jp
Het presteren van FM
No full textPrestatieafspraken. Prestatiespecificaties. Prestatiecontracten. Het woord prestatie duikt steeds vaker op in de wereld van FM. Maar wat bedoelen we er nu precies mee? En kunnen we de prestaties van FM wel op een betrouwbare en valide manier meten? Een beschouwing vanuit de wereld van een belangrijke facility: de huisvesting.Real Estate and HousingArchitecture and The Built Environmen
The Added Value of FM: Different Research Perspectives
No full textPurpose: This paper aims to present and compare research perspectives and theoretical reflections from a variety of academic fields on the concept of Added Value of Facilities Management (FM).Theory: The starting point is the so-called FM Value Map, which was presented in a paper by Jensen (2009) at the research symposium at EFMC 2009 in Amsterdam.Methodology: Literature reviews of the most influential journals within the academic fields of FM, Corporate Real Estate Management and Business to Business Marketing; reflections on EFMC-presentations; discussions between participants of an EuroFM research collaboration group working on a further exploration and testing of the FM Value Map.Findings: The research shows a number of different definitions and focus points of Added Value of FM, dependent on the academic field and the area of application. The different research perspectives explored a holistic view on the added value of FM by the integration of an external market based view (with a focus on the aimed output) and the internal resource based view (with a focus on the input from FM and RE). Good relationship management and building on trust shows to be equally important as delivering the agreed services. In order to measure the multidimensional components of adding value both qualitative and quantitative approaches are needed.Originality/value: Usually the concept of Added Value is discussed from a mono-disciplinary point of view. Based on this international collaboration a more complete picture will arise. The different backgrounds of the authors add value to an increased understanding of the added value of FM by comparing and testing different ways of conceptualising this concept. This is of great importance to FM-research and evidence-based FM as a sound basis for the long term recognition of FM.Accepted Author ManuscriptReal Estate Managemen
Performance measurement in the context of CREM and FM
No full textPurpose: To discuss trends in organisational performance measurement, to identify and discuss widely used performance criteria and key performance indicators (KPIs) in general and in the fields of Facility Management (FM) and Corporate Real Estate Management (CREM), and to identify how a more holistic measurement framework could be used in measuring the added value of FM and CREM i.e. to find out how well FM and CREM are contributing to the company’s’ performance and strategies.Methodology: A review of general management, FM and CREM literature on performance measurement and KPIs in connection to added value of FM, case studies into performance measurement as part of a PhD research in progress that is being conducted by the first author (with the second author being one of the supervisors) and interviews with CEO’s in different countries as part of a finalized PhD research of the third author.Findings: The research traced a number of performance measurement models and resulted in a list of useful KPIs that have been classified according to the FM Value Map impacts: social, environmental, satisfaction, cost, productivity, adaptation and culture. The present list shows a holistic approach and aligns to different impacts on relevant stakeholders and the surroundings.Practical implications: The performance models and KPIs can be used as input to integrated and well balanced performance management and performance measurement, including benchmarking with competitive organisations, as part of professional Facility Management and Corporate Real Estate Management.Research limitations: We did not conduct a quantitative analysis of how often a particular KPI has been mentioned in literature; besides only a few empirical tests have been conducted on operationalization and application of KPIs in current FM and CREM practice.Originality/value: Combining of the findings from two Phd-studies on performance measurement and performance management has led to a new and well classified list of KPIs.Real Estate Managemen
FM and Web Based Solution: A Novel Approach to Monitor and Control Home Appliances using Mobile Phone
No full textThe capacity of controlling various electrical and electronics devices in a wireless and remote fashion has provided a great convenience to many people in life. Through a wireless distant control system, people can do remote operation without directly accessing the host of home appliances like fan, lamp, TV, washing machines and others. Pocket switch is one of these types of system which we can use to control home appliances smartly from anywhere. The main objective of this work is to make such a system which controls the home appliances remotely using Web service and FM technology from a mobile phone. This paper discusses two methods of controlling home appliances. The first one is web service based where server will generate a command to the controller computer and the second one is FM network based where server will synthesize the SMS in to speech
Perry Fm paleo alluvial fan
No full textPerry Fm paleo alluvial fanKelley NGGDPP Grant 2019https://digitalmaine.com/mgs_geologic_field_photos/12320/thumbnail.jp
An FM Chirp Waveform Generator and Detector for Radar: Sawtooth Generator and FM Detector
No full textThe "FM Chirp Waveform Generator and Detector for Radar" is a Bachelor graduation project with an educational purpose. In this thesis, two modules of the whole system are designed and simulated. In particular, the sawtooth generator and the FM detector. The sawtooth generator is used to generate a linearly increasing signal, which can be used to make a chirp signal. The FM detector is used to extract the original information signal from the received FM signal. The used procedure consisted of determining possible implementations, setting up the design equations, choosing component values and simulating the circuits in ADS. The sawtooth generator was implemented using a ramp generator, Schmitt trigger and a voltage clamper while the FM detector was implemented using a balanced slope detector and a differential-to-single-ended converter. The results showed that the sawtooth generator can successfully produce a sawtooth waveform and that the FM detector can successfully retrieve it. It was concluded that both the modules satisfy all the requirements, meaning that they should work as expected in the whole system. Finally, the future steps were listed which, among others, include improving the linearity of the sawtooth generator and the FM detector.An FM Chirp Waveform Generator and Detector for RadarElectrical Engineerin
The Concept of added value of FM
No full textPurpose: This chapter presents research perspectives and theoretical reflections on the concept of added value of FM from a variety of academic fields.Methodology: A literature review of the most influential journals within the academic fields of Facilities Management (FM), Corporate Real Estate Management (CREM) and Business to Business Marketing (B2B Marketing).Findings: The research shows different definitions and focus points, dependent on the academic field and the area of application. The different research perspectives explored a holistic view on the added value of FM by the integration of an external market based view (with a focus on the aimed output) and the internal resource based view (with a focus on the input from FM and real estate). Good relationship management and building on trust shows to be equally important as delivering the agreed services.Practical implications: A clear conceptualization of the concept of added value of FM is of utmost importance for further research into the added value of FM and well-considered, evidence-based Value Adding Management in practice.Research limitations: Due to limited time not all FM-related journals could be included in the literature review. The included journals were analysed over a time period of ten years, with a focus on interesting topics and less on a thematic cross-paper analysis in-depth.Originality/value: Usually the concept of added value is discussed from a mono-disciplinary point of view. The different backgrounds of the authors add value to an increased understanding of the added value of FM by comparing and testing different ways of conceptualising this issue.Real Estate Managemen
The value of FM for a healthy urban environment; application of the FM Value Map to Urban FM
No full textBackground and aim - Facility management is the art of facilitating the core process of a company, providing an inspiring and healthy environment for both employees and clients. When the perspective would be broadened from healthy buildings to healthy cities, what value could be added by an “Urban FM” approach, facilitating living in a city, striving to offer a healthy and inspiring urban environment? In 2010 the FM Value Map was introduced, offering a conceptual framework that can be used in general, to provide a better understanding of the value and contributions of FM to a business and its surroundings. The aim of this paper is to discuss if the FM Value Map can also be used as a conceptual framework to understand and explain how Urban FM can contribute to a healthy and inspiring urban environment. Methods - The FM Value Map was applied to the Molukkenpark, an urban park in a Groningen neighbourhood. To fill in the model, desk research was combined with the findings from interviews and attentive observations of phenomena related to facility management and management of the urban environment. Results - Insight into the applicability of the FM Value Map from an Urban FM perspective. Originality - This is the first time that the FM Value Map is tested concerning Urban FM. Practical or social implications - The results are relevant for the development of the (Urban) FM profession and the curricula of education in the fields of FM and the built environment. Type of paper - Research paper (short)
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