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Diffuser (sewage)

About: Diffuser (sewage) is a research topic. Over the lifetime, 6487 publications have been published within this topic receiving 40404 citations.


Papers
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Patent
23 Mar 1998
TL;DR: In this paper, the shape and size of the cross-section surface, an axis of the supply section and the depth of a diffuser section are selected, and the diffuser is cut by jet boring, so that it is inside the selected cross-sectional surface in the region of a supply section.
Abstract: The method involves selecting the shape and size of the cross-section surface, an axis of the supply section and the depth of a diffuser section and the shape and size of its exit surface at the outlet. A passage bore is formed with a cross-section surface inside the selected cross-section surface of the supply section. The diffuser section is cut by jet boring, so that it is inside the selected cross-section surface in the region of the supply section.

17 citations

Journal ArticleDOI
TL;DR: In this article, a numerical study has been carried out on a new design of ejector diffuser (infrared suppression device), which conceptualizes exploiting the shape of the slot openings.
Abstract: A numerical study has been carried out on a new design of ejector diffuser (infrared suppression device). New design conceptualizes exploiting the shape of the slot openings. A circular arc is provided to guide the entrained fluid at the slot openings. Performance of guided-slot ejector diffuser (GED) has been compared with conventional (non-guided-slot) ejector diffuser (NGED) in terms of local and cumulative mass entrainment ratios, temperature distribution and static pressure recovery. Three slot-area variations are also studied, namely (i) increasing slot-area ranging 1 ≤ A0 ≤ 2.02, ( 0 A is area of 1 st slot) (ii) constant slot-area A0 = 1 and (iii) decreasing slot-area ranging 0.49 ≤ A0 ≤ 1. Simulations have been carried out at fixed Reynolds number Re = 1.3  10. It is observed that GED has 3.5% higher cumulative mass entrainment ratio than NGED. GED forms cold annulus region below ejector diffuser wall from 1 slot onwards which results in wall temperatures being close to ambient temperature (300 K). Higher mass entrainment rate and lower wall temperatures make GED a better infrared suppression device but static pressure recovery is better in NGED (Cp = 0.79) compared to GED (Cp = 0.43). Slot-area study reveals that the performance of increasing slot-area for GED and NGED is superior then constant and decreasing slot-area configurations. The cumulative mass entrainment is 20% higher while static pressure recovery is 45% more for the increasing slot-area GED when compared to the decreasing slot-area GED.

17 citations

Patent
16 May 2002
TL;DR: In this paper, a light diffuser comprising a perimeter area and a central area is described, where the perimeter area contains a light director that directs at least a portion of the light incident on it toward the central area.
Abstract: Disclosed is a light diffuser comprising a perimeter area and a central area wherein the perimeter area contains a light director that directs at least a portion of the light incident on it toward the central area.

17 citations

Patent
22 Sep 2008
TL;DR: In this article, a system and methods for integrating heat exchanger elements of HRSG systems with gas turbine exhaust diffusers are provided in the disclosed embodiments, which may include integrating steam pipe elements with various components of an exhaust diffuser, such as turning vanes, exhaust frame struts, exit guide vanes and associated support structures.
Abstract: Systems and methods for integrating heat exchanger elements of HRSG systems with gas turbine exhaust diffusers are provided in the disclosed embodiments. The systems and methods may include integrating heat exchanger elements, such as steam pipes, with various components of an exhaust diffuser. For example, the heat exchanger elements may be integrated with inlet turning vanes, exhaust frame struts, exit guide vanes, associated support structures, and other components of the exhaust diffuser. In addition, the heat exchanger elements may be integrated with multiple components of a single exhaust diffuser. Moreover, the heat exchanger elements may be integrated with the components of the exhaust diffuser within an airfoil, which may encompass both the heat exchanger elements and the individual component of the exhaust diffuser. The use of airfoils may help ensure certain aerodynamic properties of the heated exhaust gas flowing across the exhaust diffuser components.

17 citations


Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20223
2021132
2020255
2019277
2018261
2017242