Fuel Jettison simulation using Smoothed Particle Hydrodynamics (SPH)

这项研究的目的是开发一款软件，用于识别飞行中飞机抛洒的燃料对飞机表面造成污染的潜在风险。为了减少认证成本，通过模拟场景来减少所需的飞行测试是可取的。项目软件可能会采用从现有CFD求解器中接受流动解的形式，并将该解的力应用于基于颗粒的方法，该方法将对燃料进行建模。这将具有一阶影响，即流动溶液会影响燃料方向，但燃料对流动溶液没有影响。目前，正在研究使用平滑粒子流体动力学（SPH）来模拟燃料，但是存在其他更合适的可能性。考虑到阻力系数在整个过程中不是恒定的，因此该项目的关键挑战将是在燃料表面上的力的传递。这些颗粒并不总是作为精细分散的独立颗粒，它们经常形成改变阻力系数的自由表面。这是一个需要一些研究和调查的领域，以便准确和有效地实施。

The objective of the research is to create a piece of software that will identify the potential risk of contamination on an aircraft surface by fuel being jettisoned from the aircraft in flight. In order to reduce certification costs, it is desirable to reduce the flight testing needed by simulating the scenario instead.The project software will likely take the form of accepting a flow solution from an existing CFD solver, and applying the forces from this solution to a particle based method that will be modelling the fuel. This will have first order influence, meaning that the flow solution shall influence the fuel direction, however the fuel shall have no effect on the flow solution. At present, the use of smoothed particle hydrodynamics (SPH) is being investigated to model the fuel, however other possibilities exist that could be more appropriate.The key challenge in the project will be the communication of the force on the fuel surface, given that the coefficient of drag is not constant nor consistent throughout. The particles are not always acting as finely dispersed particles that are independent, and are frequently forming free surfaces that alter the coefficient of drag. This is an area that will require some research and investigation in order to implement accurately and effectively.