A steady-state three-dimensional body-force model is presented for nacelle-fan system modeling. The model is based on three-dimensional averaged governing equations that are rigorously derived from three-dimensional unsteady Reynolds-Averaged Navier–Stokes equations. The three-dimensional nature of the model provides intuitive advantages, in terms of both flow physics and implementations, in modeling inlet distortion problems. One application of this model is to predict the effects of the fan system under inlet distortion upon the upstream and downstream flow field of the fan system. This is particularly useful for nacelle designers. The proposed body force model is formulated and implemented without any knowledge of the fan blade geometry. Instead, fan performance data provided by engine suppliers are fed into the body force model to replicate/predict the fan characteristics and their interactions with the upstream flow field under inlet distortions. This approach is validated with inlet distortion data to demonstrate its capability in general off-design conditions.

提出了用于机舱风扇系统建模的稳态三维人体力模型。该模型基于三维平均控制方程，该方程是严格根据三维非稳态雷诺平均Navier–Stokes方程推导的。该模型的三维性质在建模入口畸变问题方面在流物理学和实现方面都具有直观优势。该模型的一种应用是预测风扇系统在入口变形下对风扇系统上游和下游流场的影响。这对机舱设计人员特别有用。拟定的车身力模型是在不了解风扇叶片几何形状的情况下制定和实施的。代替，发动机供应商提供的风机性能数据被输入到车身力模型中，以复制/预测风机特性及其在进气口变形下与上游流场的相互作用。该方法已通过入口畸变数据验证，以证明其在一般非设计条件下的能力。