Engine Coolant Flow Simulation - A Correlation Study

Sandford, Malcolm H.; Postlethwaite, Ian

doi:10.4271/930068

Cited by 18 publications

(5 citation statements)

References 2 publications

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“…The outside is exposed to cooling water at 353 K, with a heat transfer coeficient including convection and radiation of 5000 W/ (m 2 ·K) [12,13]. In addition, this case is in line with the values assumed for ICE.…”

Section: Calculation Assumptionsmentioning

confidence: 67%

“…Today valved pulsejets uses petal valves, which have a very short life span. When subject to the extreme temperatures, pressures and very high frequency, tests performed at NASA Glenn [13] demonstrated that the valves last approximately ifty seconds. This is detrimental to pulsejet performance and hinders research efforts.…”

Section: Today Valved Pulsejet Architecturementioning

confidence: 99%

See 1 more Smart Citation

Temperature Oscillations in the Wall of a Cooled Multi Pulsejet Propeller for Aeronautic Propulsion

Trancossi

Páscoa

Xisto

2016

SAE Technical Paper Series

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Section: Calculation Assumptionsmentioning

confidence: 67%

Section: Today Valved Pulsejet Architecturementioning

confidence: 99%

Temperature Oscillations in the Wall of a Cooled Multi Pulsejet Propeller for Aeronautic Propulsion

Trancossi

Páscoa

Xisto

2016

SAE Technical Paper Series

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“…Although a few years have passed since it was written we recommend his paper (see French 1970;Sandford and Postlethwaite 1993;Brasmer and Hoag 1989). French at Ricardo has long been recognized as a leader in engine thermal management.…”

Section: Recommendations For Further Readingmentioning

confidence: 99%

Vehicular Engine Design

Hoag

Dondlinger²

2016

Powertrain

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“…Inside the chamber it has been assumed a convective coefficient in line with values of ICE (Internal Combustion Engine): U = 1000 W/(m 2 · K) including radiation transfer [12,13]. The outside is exposed to cooling water at 353 K, with a convective coefficient of 5000 W/(m 2 · K) [14,15]. In addition, this case is in line with the values assumed for ICE.…”

Section: Preliminary Assumptionsmentioning

confidence: 99%

Thermodynamic Analysis and Preliminary Design of the Cooling System of a Pulsejet for Aeronautic Propulsion

Trancossi¹,

Mohammedalamin²,

Páscoa³

et al. 2016

IJHT

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This paper is a preliminary step through an effective redesign of valved pulsejet. This redesign activity relates to both thermodynamics and heat transfer. It aims to overcome their intrinsic limits: short service life of the valves and low energy efficiency of the Lenoir cycle. A detailed analysis of the operative behavior of pulsejets allowed the authors to advance an effective hypothesis about redesigning this propulsion system. A preliminary bibliographic analysis shows that the very high temperature that the walls of the combustion chamber reaches does not allow the use of more effective valves with respect to the petal valves or grid mounted reed valves. The absence of any compression, which is a characteristic property of the Lenoir cycle, is the main cause of the low thermodynamic efficiency of the system. The intrinsic fragility of these valve systems has blocked any further development of the valved pulsejet. A preliminary feasibility analysis of a cooling system, which can be used on pulsejets, is then a preliminary element both in the direction of improving both their thermodynamic performance and their robustness. The considered working conditions are: temperature of 1500 K, which oscillates with an amplitude ±500 k and a frequency of 30 Hz. The refrigerant is considered water and its average temperature is supposed 80 º C. Analysis of the temperature profile within the wall and the effects of the oscillations of gas temperature have been evaluated, together with a preliminary design of the cooling system.

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Engine Coolant Flow Simulation - A Correlation Study

Cited by 18 publications

References 2 publications

Temperature Oscillations in the Wall of a Cooled Multi Pulsejet Propeller for Aeronautic Propulsion

Temperature Oscillations in the Wall of a Cooled Multi Pulsejet Propeller for Aeronautic Propulsion

Vehicular Engine Design

Thermodynamic Analysis and Preliminary Design of the Cooling System of a Pulsejet for Aeronautic Propulsion

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