NONSPHERICALDROPLET · Understanding non-spherical droplet vaporisation of single-component hydrocarbon fuels and multi-component biofuel blends
7РП — „Хора“ (Действия „Мария Кюри“)
- Период
- 2014-02-02 → 2016-02-01
- Финансиране от ЕС
- 309 235 €
- Участници
- 1
- Схема
- MC-IEF
Линиите свързват координатора с партньорите.
Накратко на български
Изпаряването на капки от въглеводородни горива и биогорива, които не са сферични, се анализира чрез техната форма и размер. Това помага за подобряване на моделите за горене и разпръскване на течности в индустрията и атмосферата.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Periodic Report Summary 1 - NONSPHERICALDROPLET (Understanding non-spherical droplet vaporisation of single-component hydrocarbon fuels and multi-component biofuel blends)
Understanding of liquid vaporisation has been long considered an important topic in improving multi-phase flow and combustion models and has been studied extensively over the years. Despite that, limited information has become available for the vaporization of non-spherical droplets while use of biofuels and their blends further complicates the process. The importance of atomisation is widely accepted by academic and industrial communities and has been extensively studied experimentally and theoretically for various applications, such as the efficient distribution of agricultural sprays, the formation of raindrops in the atmosphere and the mixing of liquid fuels in combustion systems. To a large extent, the current understanding of the primary and secondary breakup of fuel jets is derived from fundamental experiments conducted on single-component liquid jets and simplified nozzle geometries. Secondary droplet breakup is more commonly studied using realistic injectors and fuels although the high density of the sprays often restricts the measurements to locations that are closer to the cylinder liner than to the nozzle orifice. The spherical droplet approximation is convenient, both in experimental and theoretical studies, but it is overly simplistic for most practical applications since the droplet has a non-spherical shape for the most of its lifetime. Droplet deformation and breakup processes are expected to be affected by the shape, size and orientation of non-spherical droplets relative to the surrounding air motion. Heat transfer and evaporation will be directly affected by the morphology of deformed droplets through a number of processes, including the increased surface area between the liquid and surrounding gas.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
The proposed project seeks a thorough investigation of the vaporisation of single- and multi-component non-spherical fuel droplet blends from first principles, using detailed computational fluid dynamics. The liquid will be considered as a two-phase fluid consisting of many liquid components and their corresponding vapour species. The full Navier-Stokes, energy and transport equations for each of the liquid and vapour species inside and outside the droplet will be solved simultaneously, together with the VOF equation that will be employed for the prediction of droplet shape under convective flow conditions. Various modes of droplet deformation as reported in the literature will be considered. A local vaporisation rate model will be further utilised for the prediction of phase-change without considering empirical correlations for the droplet shape. Thus, the bias of the widely used assumption of spherical droplets will be removed. Model validation will be performed by utilising experimental data of fuel droplets with well known properties. However, fast depletion of fossil fuel resources and increased demand for petroleum based fuels have led to the development and widespread use of alternative sources of renewable and environmentally friendly fuels (biofuels), like vegetable oils, alcohols and bio-Diesels. Understanding in more detail their effect on vaporisation of droplets is prerequisite for their effective use. In this study, computer simulation of fuel vaporisation utilising properties for a wide range of fuels will be performed which will be representative of conditions realised in automotive, marine, aeronautical and power generation industries.
Оригинален текст от CORDIS (на английски).
Участници
- CITY ST GEORGES UNIVERSITY OF LONDON · LONDONКоординаторОбединеното кралство
Връзки
Данни: CORDIS, © Европейски съюз