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forced mixer lobes in ejector designs

Crushing Plants

Mobile crushing plants are built ready-mounted on their own travel gear. Semi-mobile plants, on the other hand, are moved from one location to the next as a piggyback load on separate haul units. Each crushing plant comes ready to operate with its own feed hopper, feed conveyor, discharge conveyor and material transfer belt. The size and design of the crusher naturally depends upon the work that it is intended for.

Crushing Plants

Semi-mobile crushing plants are always to be recommended when a change of location in long periods is required in order to optimize the raw material transportation- and operational-costs of the quarry department.

Mixer-Ejector Noise-Suppressor Model

May 23, 2012 · Mixer-Ejector Noise-Suppressor Model. David E. Tew , ... Forced mixer lobes in ejector designs. W. PRESZ, JR. and ...

Numerical Simulation of Lobed Exhaust Ejector

Exhaust ejectors are good ventilations and cooling equipments. By the method of numerical simulation, researches on cylindrical exhaust ejector, lobed exhaust ejector and lobed exhaust ejector with twisted blades are conducted in this paper to study the effects of different ejector structures on flow field uniformity.


The mixer-ejector engine consists of a low-bypass ratio mixed flow turbofan coupled to an exhaust mixer ejector configuration (ejector doors and forced mixer) followed by a condi-nozzle (Fig. 1). NLR’s Flight Physics Department (AVFP, Laban) did exploratory CFD design calculations with an Euler code to capture the main flow physics of the ...

Method for flap design manufacture of flow mixer made of

SUBSTANCE: method for flap design manufacture of flow mixer of gas turbine with areas located higher and lower along the flow that form multi-lobe skirt, is that: it is made of several composite elements of fibrous texture of a preformed fibrous work piece from refractory fibres with a shape corresponding to the flap design form.


Jan 27, 2011 · The ring 118 of mixer lobes 120a combined with the ejector shroud 128 can be thought of as a mixer/ejector pump. This mixer/ejector pump provides the means for consistently exceeding the Betz limit for operational efficiency of the wind turbine.

Research on the Rectangular Lobed Exhaust Ejector /Mixer

ejector/mixer systems have received great attention by many researchers in the recent years (Refs. 1-10) and they have been widely applied to the aero-engine area. For example, on the commercial aero-engines, such as JT8D-217C, CFM56-5C and RB211-524G/H, lobed ex-haust ejector/mixer systems had been used to reduce

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Multi-Stage Mixer/Ejector Systems

Forced mixer lobes generate large scale axial vorticity which results in rapid mixing and improved diffuser performance. Ejector testing was conducted using both an ejector wind tunnel.

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Forced mixer lobes in ejector designs

May 23, 2012 · Mechanisms of lobed jet mixing: About circularly alternating-lobe mixers Aerospace Science and Technology, Vol. 98 Research on Nonlinear Oscillation Suppression and Mixing Characteristics of RVABI Base on Bypass Pressure Fluctuation

Some flow characteristics of lobed forced mixers at

Abstract The flow characteristics of two types of lobed forced mixers, the unscalloped and the scalloped mixers, have been examined at velocity ratios higher than unity, in relation to the variation of mass flux uniformity, the decay of the streamwise vorticity, the variation of turbulent kinetic energy and the growth of the shear layer with distance …

Visualization of Flows behind the Lobed Forced Mixers Using

Flow visualization studies have been conducted using the smoke-wire technique to examine the flows behind lobed forced mixers of different trailing edge configurations (namely a square wave, semi-circular wave and a triangular wave) at a velocity ratio 1:1 across the lobe.

Rapid supersonic performance estimation for a novel RBCC

Rapid supersonic performance estimation for a novel RBCC engine inlet. ... or forced mixer lobes ... An ejector air intake design method for a novel RBCC rocket ...

Effects of sheltering and outlet shaping on surface

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; Received:2019-09-16 Revised:2019-09-30 Online:2020-02-15 Published:2019-11-07

Stereoscopic PIV measurement of a lobed jet mixing flow

Abstract. In a continuing effort to study the mixing enhancement by large scale streamwise vortices generated by a lobed nozzle, a high-resolution stereoscopic PIV system was used in the present study to conduct three-dimensional measurements of air jet flows exhausted from a lobed nozzle and a conventional circular nozzle.

Experimental Measurement of the Vortex Development

An experiment was set up to investigate the mixing processes downstream of a mixer. Air flow was independently supplied to each side of the forced mixer by separate centrifugal blowers. Pressures were measured at the entrance to the lobes with a pitot-static probe to document the characteristics of the approaching boundary layer.

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Computation and Validation of Parameter Effects on Lobed

Received date: 2004 03 26; Revision received date: 2005 03 30 Foundation item: Aeronaut ical Science Foundat ion of Ch ina Computation and Validation of Parameter Effects on Lobed Mixer Ejector Performances ZHANG Jing zhou, SHAN Yong, LI Li guo ( Col lege of Energy and Pow er Engineering, Nanj ing Univer si ty of A eronautics and A st ronaut ics , Nanj ing 210016 , China) Abstract: Three ...

Micro-Gas Turbine Engine Ejector-Mixer Design and Testing

result serves as a base of knowledge useful to the design of a micro-gas turbine engine ejector-mixer. 4 Technical Background 4.1 Ejector-Mixer Theory As the name suggests, an ejector-mixer is composed of two parts: the ejector, and the mixer. The ejector is the shroud in which the engine exhaust primary flow and the ambient conditioned

Aerothermodynamic benefits of mixed exhaust turbofans

Sep 11, 2017 · Also, a comparison of gross thrust (FG) was made at the off-design condition of Sea Level Take-Off (SLTO) when both models were run to the same fuel flow. Again the mixed exhaust design showed a higher gross thrust up to a design BPR of 7, and a loss in thrust for a design BPR of 8.

Performance Simulation of an ideal mixer-ejector turbofan

The mixer-ejector engine consists of a low-bypass ratio mixed flow turbofan coupled to an exhaust mixer ejector configuration (ejector doors and forced mixer) followed by a condi-nozzle (Fig. 1). NLR’s Flight Physics Department (AVFP, Laban) did exploratory CFD design calculations with an Euler code to capture the main flow physics of the ...

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Institut f. Luft- u. Raumfahrt

[6] W. Presz et al.: Forced Mixer Lobes in Ejector Designs. Journal of Propulsion, 4, pp 350-355, August 1988. [7] W. Presz et al.: Thrust Augmentation with Mixer/ Ejector Systems. Paper AIAA 2002-0230, 40th AIAA Aerospace


EJECTORS & VACUUM SYSTEMS Chem Process has been designing Steam Jet Thermocompressors since decades and each unit is designed specifically to suit a customer's process and

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Gas Ejector

Ejector troubleshooting_brochure . Air Ejector . Air Ejector. ejector functions . Understanding Ejector . Ejector Troubleshooting ...

Scarfing and Scalloping Effects on Lobed Forced Mixer at Low

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Performance improvement of propulsion systems by optimization

the forced mixer for cold fan and core flow is to the one of the annular mixer the lower the loss is. As can be seen the 18 lobe mixer has a significantly higher thrust and thus lower loss than the datum 16 lobe mixer whereas the 20 lobe mixer is close to the 16 lobe mixer. The mixing efficiency is in simple terms the diffe-rence in hot and ...