FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W25092393> ?p ?o ?g. }

• W25092393 abstract "This thesis deals with flow measuring techniques applied to steady and pulsating gas flows relevant to gas exchange systems for internal combustion engines. Gas flows in such environments are complex, i.e. they are inhomogeneous, three-dimensional, unsteady, non-isothermal and exhibit significant density changes. While a variety of flow metering devices are available and have been devised for such flow conditions, the performance of these flow metersis to a large extent undocumented when a strongly pulsatile motion is superposed on the already complex flow field. Nonetheless, gas flow meters are commonly applied in such environments, e.g. in the measurement of the air flow to the engine or the amount of exhaust gas recirculation. The aim of the present thesis is therefore to understand and assess, and if possible to improve the performance of various flow meters under highly pulsatile conditions as well as demonstrating the use of a new type of flow meter for measurements of the pulsating mass flow upstream and downstream the turbine of a turbocharger. The thesis can be subdivided into three parts. The first one assesses the flow quality of a newly developed flow rig, designed for measurements of steady and pulsating air flow at flow rates and pulse frequencies typically found in the gas exchange system of cars and smaller trucks. Flow rates and pulsation frequencies achieved and measured range up to about 200 g/s and 80 Hz, respectively. The time-resolved mass flux and stagnation temperature under both steady and pulsating conditions were characterized by means of a combined hot/cold-wire probe which is part of a newly developed automated measurement module. This rig and measurement module were used to create a unique data base with well-defined boundary conditions to be used for the validation of numerical simulations, but in particular, to assess the performance of various flow meters. In the second part a novel vortex flow meter that can measure the timedependent flow rate using wavelet analysis has been invented, verified and extensively tested under various industrially relevant conditions. The newly developed technique was used to provide unique turbine maps under pulsatile conditions through time-resolved and simultaneous measurements of mass flow, temperature and pressure upstream and downstream the turbine. Results confirm that the quasi-steady assumption is invalid for the turbine considered as a whole. In the third and last part of the thesis, two basic fundamental questions that arose during the course of hot/cold-wire measurements in the aforementioned high speed flows have been addressed, namely to assess which temperature a cold-wire measures or to which a hot-wire is exposed to in high speed flows as well as whether the hot-wire measures the product of velocity and density or total density. Hot/cold-wire measurements in a nozzle have been performed to test various hypothesis and results show that the recovery temperature as well as the product of velocity and stagnation density are measured." @default.
• W25092393 created "2016-06-24" @default.
• W25092393 creator A5025654035 @default.
• W25092393 creator A5040867761 @default.
• W25092393 creator A5042802376 @default.
• W25092393 creator A5047213636 @default.
• W25092393 date "2012-01-01" @default.
• W25092393 modified "2023-09-26" @default.
• W25092393 title "Response of common flowmeters to unsteady flow" @default.
• W25092393 cites W1506283822 @default.
• W25092393 cites W1522662726 @default.
• W25092393 cites W19576952 @default.
• W25092393 cites W1966749203 @default.
• W25092393 cites W1973837180 @default.
• W25092393 cites W1989341411 @default.
• W25092393 cites W2010587691 @default.
• W25092393 cites W2018206561 @default.
• W25092393 cites W2027496876 @default.
• W25092393 cites W2030595065 @default.
• W25092393 cites W2032811932 @default.
• W25092393 cites W2044111876 @default.
• W25092393 cites W2059695069 @default.
• W25092393 cites W2060091230 @default.
• W25092393 cites W2061579863 @default.
• W25092393 cites W2074249204 @default.
• W25092393 cites W2074652149 @default.
• W25092393 cites W2091301573 @default.
• W25092393 cites W2092491279 @default.
• W25092393 cites W2142847636 @default.
• W25092393 cites W64850912 @default.
• W25092393 cites W1913416190 @default.
• W25092393 hasPublicationYear "2012" @default.
• W25092393 type Work @default.
• W25092393 sameAs 25092393 @default.
• W25092393 citedByCount "0" @default.
• W25092393 crossrefType "journal-article" @default.
• W25092393 hasAuthorship W25092393A5025654035 @default.
• W25092393 hasAuthorship W25092393A5040867761 @default.
• W25092393 hasAuthorship W25092393A5042802376 @default.
• W25092393 hasAuthorship W25092393A5047213636 @default.
• W25092393 hasConcept C121332964 @default.
• W25092393 hasConcept C132643394 @default.
• W25092393 hasConcept C143428516 @default.
• W25092393 hasConcept C16302685 @default.
• W25092393 hasConcept C164705383 @default.
• W25092393 hasConcept C175580448 @default.
• W25092393 hasConcept C180925781 @default.
• W25092393 hasConcept C23898865 @default.
• W25092393 hasConcept C2781424430 @default.
• W25092393 hasConcept C30198954 @default.
• W25092393 hasConcept C33493971 @default.
• W25092393 hasConcept C38349280 @default.
• W25092393 hasConcept C39432304 @default.
• W25092393 hasConcept C57879066 @default.
• W25092393 hasConcept C63066824 @default.
• W25092393 hasConcept C71924100 @default.
• W25092393 hasConcept C79191276 @default.
• W25092393 hasConceptScore W25092393C121332964 @default.
• W25092393 hasConceptScore W25092393C132643394 @default.
• W25092393 hasConceptScore W25092393C143428516 @default.
• W25092393 hasConceptScore W25092393C16302685 @default.
• W25092393 hasConceptScore W25092393C164705383 @default.
• W25092393 hasConceptScore W25092393C175580448 @default.
• W25092393 hasConceptScore W25092393C180925781 @default.
• W25092393 hasConceptScore W25092393C23898865 @default.
• W25092393 hasConceptScore W25092393C2781424430 @default.
• W25092393 hasConceptScore W25092393C30198954 @default.
• W25092393 hasConceptScore W25092393C33493971 @default.
• W25092393 hasConceptScore W25092393C38349280 @default.
• W25092393 hasConceptScore W25092393C39432304 @default.
• W25092393 hasConceptScore W25092393C57879066 @default.
• W25092393 hasConceptScore W25092393C63066824 @default.
• W25092393 hasConceptScore W25092393C71924100 @default.
• W25092393 hasConceptScore W25092393C79191276 @default.
• W25092393 hasLocation W250923931 @default.
• W25092393 hasOpenAccess W25092393 @default.
• W25092393 hasPrimaryLocation W250923931 @default.
• W25092393 hasRelatedWork W1742856108 @default.
• W25092393 hasRelatedWork W1964151175 @default.
• W25092393 hasRelatedWork W2002055278 @default.
• W25092393 hasRelatedWork W2020191919 @default.
• W25092393 hasRelatedWork W2029563469 @default.
• W25092393 hasRelatedWork W203282595 @default.
• W25092393 hasRelatedWork W2064379536 @default.
• W25092393 hasRelatedWork W2314360384 @default.
• W25092393 hasRelatedWork W2557759257 @default.
• W25092393 hasRelatedWork W2928410755 @default.
• W25092393 hasRelatedWork W2935964757 @default.
• W25092393 hasRelatedWork W2945902229 @default.
• W25092393 hasRelatedWork W3005422962 @default.
• W25092393 hasRelatedWork W3016689928 @default.
• W25092393 hasRelatedWork W3027304921 @default.
• W25092393 hasRelatedWork W3038028618 @default.
• W25092393 hasRelatedWork W3046893288 @default.
• W25092393 hasRelatedWork W94453558 @default.
• W25092393 hasRelatedWork W3027939121 @default.
• W25092393 hasRelatedWork W3133494379 @default.
• W25092393 isParatext "false" @default.
• W25092393 isRetracted "false" @default.
• W25092393 magId "25092393" @default.

• next