Performance Characterization of Single Expansion Ramp Nozzle at Hypersonic Mach Number
Main Article Content
Abstract
Single Expansion Ramp Nozzle (SERN) is a direct extension nozzle where the gas pressure flows from one place to other works only on one side. The SERN is a hypersonic speed demonstrator vehicle due to its advantages and operational limitations. The demonstrator vehicle is designed to attain a cruise flight at a speed of Mach 6.2. The operating limits given as constraints are the atmosphere limitations, i.e., within the lower atmosphere wherein the vehicle has to run on air-breathing scramjet engines. The project emphasizes the effect of performance parameters, namely thrust, lift and moment, due to variation in jet Mach number and jet pressure through a nozzle. The nozzle is considered separately due to the experimental limitations. The CAD model designed for the nozzle is taken. Only the vehicle's nozzle section is dissected from the whole model for the numerical simulation. The GAMBIT software is used to mesh the model and tocreate the domain space. The model is a 3D structure aligned to the 3 axis coordinate system, where the body's length is aligned along the x axis and width of the body along the z-axis. The cowl is attached to the combustion chamber exit, providing pitching stability to the vehicle. The model analysis is done in FLUENT, where the model to be solved is exported from gambit and imported to FLUENT. The cowl arrangement affects the nozzle performance and the effect of performance due to change in cowl geometry is studied. This paper presents the study of the performance parameter’s interactions with jet pressure, Mach number and cowl deflection of the nozzle
Article Details
Issue
Section
Articles
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms: a. Authors retain copyright and grant the journal right of first publication, with the work two years after publication simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal. b. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. c. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).