摘要:
An aero damping measurement system (100) is provided. The system includes a shroud (104) defining a tunnel, a hub (102) disposed within the tunnel, and a plurality of blades (103) coupled to the hub (102). The blades (103) may rotate about the hub (102). A gas pressure probe (108) may have a tip extending to the tunnel to deliver a pressurized burst into the tunnel. An aeromechanical identification system (168) may include a pressurized gas source (170), a valve (132) in fluid communication with the pressurized gas source (170), and the gas pressure probe (108) may be in fluid communication with the valve (132). The valve (132) may control a flow of a pressurized gas from the pressurized gas source (170) into the gas pressure probe (108). A pressure sensor (160) may be coupled to the gas pressure probe (108) and configured to measure a pressure within the gas pressure probe (108).
摘要:
A probe for measuring high frequent pressure oscillations of hot gases that combine redundancy of the output signals with high quality of the output signals.
摘要:
Vorgeschlagen wird eine Vorrichtung (110) zur Erfassung mindestens einer Eigenschaft eines fluiden Mediums in einem Messraum (112). Die Vorrichtung (110) umfasst mindestens ein Drucksensorelement (122) zur Erfassung eines Drucks des fluiden Mediums. Weiterhin umfasst die Vorrichtung (110) einen Druckstutzen (116) mit mindestens einer Druckbohrung (126) zur Zufuhr des fluiden Mediums zu dem Drucksensorelement (122). Das Drucksensorelement (122) ist mittels mindestens eines Trägerelements (124) gehalten und mit dem Druckstutzen (116) verbunden. Die Vorrichtung (110) ist dadurch gekennzeichnet, dass zwischen dem Trägerelement (124) und dem Druckstutzen (116) mindestens ein Drosselelement (134) formschlüssig eingebettet ist.
摘要:
A pressure sensor (10) for use in a harsh environment including a substrate (14) and a sensor die (12) directly coupled to the substrate (14) by a bond frame (70) positioned between the substrate (14) and the sensor die (12). The sensor die (12) includes a generally flexible diaphragm (16) configured to flex when exposed to a sufficient differential pressure thereacross. The sensor (10) further includes a piezoelectric or piezoresistive sensing element (46) at least partially located on the diaphragm (16) such that the sensing element (46) provides an electrical signal upon flexure of the diaphragm (16). The sensor (10) also includes an connecting component (22) electrically coupled to the sensing element (46) at a connection location that is fluidly isolated from the diaphragm (16) by the bond frame (70). The bond frame (70) is made of materials and the connecting component (22) is electrically coupled to the sensing element (46) by the same materials of the bond frame (70).
摘要:
Ein dünnes, 20 Meter langes Rohr (16) mündet über das Plenum (13) in der Brennkammer (15). Davor is ein Druckaufnehmer (18) angeschlossen. Zur Vermeidung von Verfälschungen durch reflektierte Druckwellen an Temperatursprüngen sind entweder Durchmessersprünge (D3,D2,D1) oder ein Kühlgasstrom vorgesehen. Dabei kann Gas dem Plenum (13) entnommen werden.
摘要:
Flammable fine particles (particulates) consisting principally of carbon and hydrocarbons are discharged from a diesel engine to its exhaust system. A diesel particulate oxidizer (DPO) is disposed in the exhaust passage for collecting and burning the particulates without allowing the particulates to be discharged directly to the atmosphere. This DPO comprises a ceramic foam with catalyst When the quantity of particulates collected is above a predetermined value, the DPO will undergo clogging. To prevent this, a high temperature gas containing oxygen is fed to the DPO to burn (regenerate) the collected particulates. In order to accelerate the normal regeneration of the DPO, there are provided a regeneration means for making a retard control of the fuel injection timing in the diesel engine, and a regeneration timing control means for controlling the operation of the regeneration means. Further, there is provided a regeneration timing detection means for detecting the regeneration timing of the DPO Moreover, there is provided a retard inhibition means for inhibiting the retard control for a fuel injection timing adjusting means by the regeneration timing control means according to the engine operating condition. Additionally, there are provided a forced regeneration control means forcibly regenerating the DPO under a predetermined operating condition of the engine at a regeneration timing, and a particulate combustion suppressing means for suppressing the combustion of the particulates
摘要:
Zur Ausfilterung langsamer Druckschwankungen bei einem auf Flüssigkeitsdruck ansprechenden Messgerät sind ein hydraulisches Speicherelement (12) mit einem gegen eine Federkraft veränderbaren Volumen und eine Drossel (10) vorgesehen, über welche das hydraulische Speicherelement (12) mit der den Druckschwankungen unterworfenen Flüssigkeit in Verbindung steht. Das Meßgerät (14) mißt den Druck in dem Speicherelement (12).