Thermal performance and ablation characteristics of C/C-SiC for thermal protection of hypersonic vehicle

2021 ◽  
Author(s):  
Yi-ang Shi ◽  
Bai-lin Zha ◽  
Qing-dong Su ◽  
Jin-jin Wang ◽  
Si-ye Li
Keyword(s):  
Thermal Performance ◽  
Thermal Protection ◽  
Hypersonic Vehicle ◽  
Ablation Characteristics

Thermal Performance Evaluation of Cork Phenolic for Nozzle External Thermal Protection System Using 250 kW Plasma Jet Facility

2018 ◽  
Vol 140 (7) ◽  
Author(s):  
L. Aravindakshan Pillai ◽  
N. Sreenivas ◽  
K. Krishnaraj ◽  
Vinay Unnikrishnan ◽  
M. Ajith
Keyword(s):  
Thermal Performance ◽  
Thermal Protection ◽  
Plasma Jet ◽  
Thermal Protection System ◽  
Protection System ◽  
Convective Heating ◽  
Launch Vehicles ◽  
Time Of Application ◽  
The Core ◽  
Long Time

In one of the launch vehicles of ISRO, there are two solid strap-ons attached to the core liquid engine. During the ascent phase, the external nozzle divergent of the strap-ons experiences heating due to radiation from the strap-ons as well as convective heating from the impingement of plumes from the core engine. Hence, the nozzle divergent of the strap-on beyond compliance ring is thermally protected by a coating of PC10 insulation applied over carbon/epoxy structural backup. Though the system worked satisfactorily, application of PC10 had increased the inert weight of each nozzle by 165 kg and took long time for realization. To reduce the inert weight as well as the time of application, precast phenolic based cork sheets (CkP) having lower density than PC10 were selected, as a replacement to PC10. As part of evaluating the thermal performance of the CkP material, specimen level tests with different configurations were carried out in 250 kW plasma jet facility of Vikram Sarabhai Space Centre (VSSC) wherein both the heat flux and the shear stress as expected in flight were simulated simultaneously. At the end of the test program, CkP was found to be superior to PC10 for external thermal protection system (TPS). This paper highlights details of the qualification tests carried out for clearing the cork phenolic system for use in the future launches.

scholarly journals Development of Industrial and Firefighter Protective Cloth of Base Fabric and Comparison of Fire Retardant Performance

2020 ◽  
Vol 20 (6) ◽  
pp. 109-114
Author(s):  
Hoseung Ro ◽  
Hyunpil Hong ◽  
Jinwon Cho ◽  
Myuongsu Park
Keyword(s):  
Flame Retardant ◽  
Thermal Performance ◽  
Fire Resistance ◽  
Thermal Protection ◽  
Fire Retardant ◽  
Performance Tests ◽  
Thermal Protective Performance ◽  
Follow Up Studies ◽  
Protective Performance

To develop industrial and firefighter thermal protection cloth, 12 base fabrics were prepared from a combination of several types of sample, and their thermal performances were evaluated. Thermal performance comprises flame retardant capability, radiant protective performance, and thermal protective performance. Thermal protection performance has been assessed in accordance with ISO 15025, ISO 9151, ISO 6942, and ISO 17492. In this study, however, thermal protective performance was assessed only in accordance with ISO 15025. The results showed that Samples 1-6 satisfied the fire resistance criteria, whereas Samples 7-12 did not satisfy the fire resistance criteria. Additional thermal performance tests need to be conducted in follow-up studies.

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