Fireproof simulation analysis method for fuel oil pipeline

Abstract

The fireproof simulation analysis method of the fuel and lubricating oil pipeline comprises the following steps: acquiring a flame burner and a standard flame based on the flame burner in a simulation environment, placing the fuel and lubricating oil pipeline at a set position above the flame burner for flame thermal shock simulation, and extracting temperature data of the fuel and lubricating oil pipeline; dividing a flame impact area of the pipeline into a control body, solving an energy conservation equation of the control body to obtain a working medium outlet temperature of the fuel-lubricating oil pipeline, and preliminarily judging whether the working medium in the fuel-lubricating oil pipeline has phase change or not by taking a boiling point as a judgment criterion; the method comprises the following steps: firstly, calculating a steady-state flow field in a fuel lubricating oil pipeline without adding flame to obtain a steady-state flow field calculation result; and on the basis of the calculation result of the steady-state flow field, carrying out thermal-state heat transfer solution. According to the method, the physical process of the fire prevention simulation of the fuel and lubricating oil pipeline can be decoupled, so that the fire prevention test of the fuel and lubricating oil pipeline is accurately simulated to support the fire prevention airworthiness evidence obtaining work of the fuel and lubricating oil pipeline.

Description

Technical field [0001] The present invention relates to numerical simulation of aero engine components, particularly to the simulation of combustion oil lines. Background [0002] Meeting the fire performance requirements is a key indicator of civil aviation engines, and it is also one of the basic conditions for aircraft engines to maintain the minimum safety level and meet airworthiness requirements. In order to ensure that when a fire occurs in the engine fire zone, it can still work effectively until it is safe to stop, and will not further expand the fire, CCAR33.17 fire protection clause requires that the structure and components in the engine fire zone must meet a certain fire rating (fire resistance or fire resistance) and show compliance through component fire tests. Among them, fire resistance and fire resistance refer to the fact that parts, components and accessories are subjected to standard flames (average temperature 1100±80 °C, average heat flow 116±10kW / m2) under...

AI Technical Summary

Problems solved by technology

The airworthiness certification technology of domestic civil aircraft and engines has just started, and there is insufficient research experience in the fire test and analysis of fuel oil components, and there is still a technical gap in the simulation of component fire performance, and the research on numerical simulation methods for fire test of oil fuel components is insufficient.

Images