| 摘要 |
A tomographic spray momentum mapping system and method of use for determining the spray momentum of dense, high-pressure sprays such as petroleum-based fuel sprays discharged from electronically-controlled fuel injection systems is disclosed. The present system comprises a mechanical probe assembly having a probe wire drawn across a Y-shaped handle, which includes a force transducer attached in operative relation thereto that receives force input from the impact of the spray impinging on the probe wire and generates output signals in response thereto. The probe assembly is traversed through the spray to obtain force measurements at selected points therein. The present system includes a coordinate measuring apparatus for precisely positioning the probe wire within the spray structure. The output signals derived from the transducer are processed through signal conditioning electronics and input to a computer system, which utilizes a computed topography software program to process the force measurements and convert the integrated measurements into tomographic reconstructions showing the spray momentum distribution in a two- or three-dimensional domain. This information is used directly for understanding spray structure and improvement of injection systems, and indirectly for improvement of computer spray models used to simulate engine performance.
|
