Design of Lightweight Graded Hot Structures for Hypersonic Vehicles

2012 ◽  
Vol 271-272 ◽  
pp. 838-841
Author(s):  
Qin Lu ◽  
Gui Qing Jiang ◽  
Xue Jun Zhang ◽  
Dai Ying Deng
Keyword(s):  
Thermal Protection ◽  
Thermal Environment ◽  
Thermal Response ◽  
Thermal Protection System ◽  
Functionally Graded ◽  
Protection System ◽  
Graded Materials ◽  
Thermal Environments ◽  
Long Time ◽  
Fundamental Equations

New-type hypersonic vehicle will encounter significant challenges due to severe heating environments during its long-time hypersonic flying in the atmosphere. Therefore, resusable, lightweight, high thermal resistance and anti-collision are demanded for Thermal Protection System. Traditional thermal protection system(TPS) can’t survive extreme thermal environments. In this paper, lightweight and integrated graded hot structures which composed of functionally graded materials (FGM) are addressed according to new thermal environment. It has been established nonlinear fundamental equations for hot structures. It is significant that gradation in material properties of hot structures allows the designer to tailor thermal response to meet variable thermal environment.

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.

Thermal-Structural Analysis of Ni-Based Alloy Panel with Active Cooling Thermal Protection System

2014 ◽  
Vol 644-650 ◽  
pp. 4718-4721
Author(s):  
Guo Sun ◽  
Yuan Gui Sun
Keyword(s):  
Structural Analysis ◽  
Boundary Conditions ◽  
Combustion Chamber ◽  
Thermal Protection ◽  
Thermal Environment ◽  
Aircraft Engine ◽  
Thermal Protection System ◽  
Protection System ◽  
Mechanical Loads ◽  
Optimal Value

In hypersonic environments, the development of aircraft engine presents the mitigation of the extreme thermal environment inside the combustion chamber. This paper establishes the capabilities for combustor panel design. By given the key loading and boundary conditions of the panel structure, the thermal structural analysis determines temperatures and stresses and the optimization improves panel’s robustness subject to thermal mechanical loads. A parametric sweep analysis is carried and the results give the optimal value of the panel face thickness.

Study of Ablative Thermal Protection System with Density Gradient

2021 ◽  
Vol 19 (1) ◽  
pp. 116-122
Author(s):  
Toshiyuki SUZUKI ◽  
Yuki KUBOTA ◽  
Yuichi ISHIDA ◽  
Takuya AOKI ◽  
Kazuhisa FUJITA ◽  
...  
Keyword(s):  
Density Gradient ◽  
Thermal Protection ◽  
Thermal Protection System ◽  
Protection System

scholarly journals Advanced metallic thermal protection system development

2002 ◽  
Author(s):  
M. Blosser ◽  
R. Chen ◽  
I. Schmidt ◽  
J. Dorsey ◽  
C. Poteet ◽  
...  
Keyword(s):  
Thermal Protection ◽  
System Development ◽  
Thermal Protection System ◽  
Protection System
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