title: Unstart coupling mechanism analysis of multiple-modules hypersonic inlet.
abstract: The combination of multiplemodules in parallel manner is an important way to achieve the much higher thrust of scramjet engine. For the multiple-modules scramjet engine, when inlet unstarted oscillatory flow appears in a single-module engine due to high backpressure, how to interact with each module by massflow spillage, and whether inlet unstart occurs in other modules are important issues. The unstarted flowfield and coupling characteristic for a three-module hypersonic inlet caused by center module II and side module III were, conducted respectively. The results indicate that the other two hypersonic inlets are forced into unstarted flow when unstarted phenomenon appears on a single-module hypersonic inlet due to high backpressure, and the reversed flow in the isolator dominates the formation, expansion, shrinkage, and disappearance of the vortexes, and thus, it is the major factor of unstart coupling of multiple-modules hypersonic inlet. The coupling effect among multiple modules makes hypersonic inlet be more likely unstarted.
authors.affiliation: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Jichao
authors.initials: J
authors.lastname: Hu
authors.affiliation: Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Juntao
authors.initials: J
authors.lastname: Chang
authors.affiliation: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.affiliation: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Shibin
authors.initials: S
authors.lastname: Cao
authors.affiliation: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Bao
mesh_terms: D010825:Physics