FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2904199211> ?p ?o ?g. }

• W2904199211 abstract "The shape of the modal duct of an acoustic wave propagating in a muffling system varies with the internal geometry. This shape can be either as a result of plane wave propagation or three-dimensional wave propagation. These shapes depict the distribution of acoustic pressure that may be used in the design or modification of mufflers to create resonance at cut-off frequencies and hence achieve noise attenuation or special effects on the output of the noise. This research compares the shapes of acoustic duct modes of two sets of four pitch configurations of a helicoid in a simple expansion chamber with and without a central tube. Models are generated using Autodesk Inventor modeling software and imported into ANSYS 18.2, where a fluid volume from the complex computer-aided-design (CAD) geometry is extracted for three-dimensional (3D) analysis. Mesh is generated to capture the details of the fluid cavity for frequency range between 0 and 2000Hz. After defining acoustic properties, acoustic boundary conditions and loads were defined at inlet and outlet ports before computation. Postprocessed acoustic results of the modal shapes and transmission loss (TL) characteristics of the two configurations were obtained and compared for geometries of the same helical pitch. It was established that whereas plane wave propagation in a simple expansion chamber (SEC) resulted in a clearly defined acoustic pressure pattern across the propagation path, the distribution in the configurations with and without the central tube depicted three-dimensional acoustic wave propagation characteristics, with patterns scattering or consolidating to regions of either very low or very high acoustic pressure differentials. A difference of about 80 decibels between the highest and lowest acoustic pressure levels was observed for the modal duct of the geometry with four turns and with a central tube. On the other hand, the shape of the TL curve shifts from a sinusoidal-shaped profile with well-defined peaks and valleys in definite multiples of π for the simple expansion chamber, while that of the other two configurations depended on the variation in wavelength that affects the location of occurrence of cut-on or cut-off frequency. The geometry with four turns and a central tube had a maximum value of TL of about 90 decibels at approximately 1900Hz." @default.
• W2904199211 created "2018-12-22" @default.
• W2904199211 creator A5003960122 @default.
• W2904199211 creator A5039303267 @default.
• W2904199211 creator A5060696042 @default.
• W2904199211 date "2018-12-11" @default.
• W2904199211 modified "2023-09-26" @default.
• W2904199211 title "Effects of Central Tube on Shape of Modal Duct of a Helicoid in a Simple Expansion Chamber" @default.
• W2904199211 cites W2010455364 @default.
• W2904199211 cites W2031350773 @default.
• W2904199211 cites W2051985018 @default.
• W2904199211 cites W2084954812 @default.
• W2904199211 cites W2134582264 @default.
• W2904199211 doi "https://doi.org/10.1155/2018/3276548" @default.
• W2904199211 hasPublicationYear "2018" @default.
• W2904199211 type Work @default.
• W2904199211 sameAs 2904199211 @default.
• W2904199211 citedByCount "0" @default.
• W2904199211 crossrefType "journal-article" @default.
• W2904199211 hasAuthorship W2904199211A5003960122 @default.
• W2904199211 hasAuthorship W2904199211A5039303267 @default.
• W2904199211 hasAuthorship W2904199211A5060696042 @default.
• W2904199211 hasBestOaLocation W29041992111 @default.
• W2904199211 hasConcept C104286136 @default.
• W2904199211 hasConcept C120665830 @default.
• W2904199211 hasConcept C121332964 @default.
• W2904199211 hasConcept C142724271 @default.
• W2904199211 hasConcept C176688298 @default.
• W2904199211 hasConcept C182310444 @default.
• W2904199211 hasConcept C184652730 @default.
• W2904199211 hasConcept C198394728 @default.
• W2904199211 hasConcept C24890656 @default.
• W2904199211 hasConcept C2524010 @default.
• W2904199211 hasConcept C2779753020 @default.
• W2904199211 hasConcept C2780273575 @default.
• W2904199211 hasConcept C2781212128 @default.
• W2904199211 hasConcept C33923547 @default.
• W2904199211 hasConcept C57879066 @default.
• W2904199211 hasConcept C62520636 @default.
• W2904199211 hasConcept C68115822 @default.
• W2904199211 hasConcept C71924100 @default.
• W2904199211 hasConceptScore W2904199211C104286136 @default.
• W2904199211 hasConceptScore W2904199211C120665830 @default.
• W2904199211 hasConceptScore W2904199211C121332964 @default.
• W2904199211 hasConceptScore W2904199211C142724271 @default.
• W2904199211 hasConceptScore W2904199211C176688298 @default.
• W2904199211 hasConceptScore W2904199211C182310444 @default.
• W2904199211 hasConceptScore W2904199211C184652730 @default.
• W2904199211 hasConceptScore W2904199211C198394728 @default.
• W2904199211 hasConceptScore W2904199211C24890656 @default.
• W2904199211 hasConceptScore W2904199211C2524010 @default.
• W2904199211 hasConceptScore W2904199211C2779753020 @default.
• W2904199211 hasConceptScore W2904199211C2780273575 @default.
• W2904199211 hasConceptScore W2904199211C2781212128 @default.
• W2904199211 hasConceptScore W2904199211C33923547 @default.
• W2904199211 hasConceptScore W2904199211C57879066 @default.
• W2904199211 hasConceptScore W2904199211C62520636 @default.
• W2904199211 hasConceptScore W2904199211C68115822 @default.
• W2904199211 hasConceptScore W2904199211C71924100 @default.
• W2904199211 hasLocation W29041992111 @default.
• W2904199211 hasOpenAccess W2904199211 @default.
• W2904199211 hasPrimaryLocation W29041992111 @default.
• W2904199211 hasRelatedWork W2144092886 @default.
• W2904199211 hasRelatedWork W2187124426 @default.
• W2904199211 hasRelatedWork W2375409759 @default.
• W2904199211 hasRelatedWork W2572772887 @default.
• W2904199211 hasRelatedWork W2890461315 @default.
• W2904199211 hasRelatedWork W2904199211 @default.
• W2904199211 hasRelatedWork W2921967198 @default.
• W2904199211 hasRelatedWork W2935433708 @default.
• W2904199211 hasRelatedWork W3133849375 @default.
• W2904199211 hasRelatedWork W2236314680 @default.
• W2904199211 isParatext "false" @default.
• W2904199211 isRetracted "false" @default.
• W2904199211 magId "2904199211" @default.
• W2904199211 workType "article" @default.