Numerical Simulation of Reactive Flows in Overexpanded Supersonic Nozzle with Film Cooling

المؤلفون المشاركون

Sellam, Mohamed
Chpoun, Amer

المصدر

International Journal of Aerospace Engineering

العدد

المجلد 2015، العدد 2015 (31 ديسمبر/كانون الأول 2015)، ص ص. 1-15، 15ص.

الناشر

Hindawi Publishing Corporation

تاريخ النشر

2015-04-05

دولة النشر

مصر

عدد الصفحات

15

الملخص EN

Reignition phenomena occurring in a supersonic nozzle flow may present a crucial safety issue for rocket propulsion systems.

These phenomena concern mainly rocket engines which use H2 gas (GH2) in the film cooling device, particularly when the nozzle operates under over expanded flow conditions at sea level or at low altitudes.

Consequently, the induced wall thermal loads can lead to the nozzle geometry alteration, which in turn, leads to the appearance of strong side loads that may be detrimental to the rocket engine structural integrity.

It is therefore necessary to understand both aerodynamic and chemical mechanisms that are at the origin of these processes.

This paper is a numerical contribution which reports results from CFD analysis carried out for supersonic reactive flows in a planar nozzle cooled with GH2 film.

Like the experimental observations, CFD simulations showed their ability to highlight these phenomena for the same nozzle flow conditions.

Induced thermal load are also analyzed in terms of cooling efficiency and the results already give an idea on their magnitude.

It was also shown that slightly increasing the film injection pressure can avoid the reignition phenomena by moving the separation shock towards the nozzle exit section.

نمط استشهاد جمعية علماء النفس الأمريكية (APA)

Sellam, Mohamed& Chpoun, Amer. 2015. Numerical Simulation of Reactive Flows in Overexpanded Supersonic Nozzle with Film Cooling. International Journal of Aerospace Engineering،Vol. 2015, no. 2015, pp.1-15.
https://search.emarefa.net/detail/BIM-1064500

نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)

Sellam, Mohamed& Chpoun, Amer. Numerical Simulation of Reactive Flows in Overexpanded Supersonic Nozzle with Film Cooling. International Journal of Aerospace Engineering No. 2015 (2015), pp.1-15.
https://search.emarefa.net/detail/BIM-1064500

نمط استشهاد الجمعية الطبية الأمريكية (AMA)

Sellam, Mohamed& Chpoun, Amer. Numerical Simulation of Reactive Flows in Overexpanded Supersonic Nozzle with Film Cooling. International Journal of Aerospace Engineering. 2015. Vol. 2015, no. 2015, pp.1-15.
https://search.emarefa.net/detail/BIM-1064500

نوع البيانات

مقالات

لغة النص

الإنجليزية

الملاحظات

Includes bibliographical references

رقم السجل

BIM-1064500