K型同軸熱電偶における松の木のような自己回復機能を持つ複合電気断熱層の適用
Zhenyin Hai1, Yue Chen1, Zhixuan Su1
1School of Aerospace Engineering, Xiamen University, Xiamen 361005, China.
Sensors (Basel, Switzerland)
|August 28, 2025
まとめ
研究者はコアシアル熱電偶の自己修復性電気隔離を開発し,極端な航空宇宙環境での性能を向上させました. この技術革新により,厳しい環境下での温度と熱流量測定が改善されます.
科学分野:
- 材料科学
- 航空宇宙工学
- センサー技術
背景:
- 高温コンポーネントは 激しい熱浸食に晒されます
- 同軸熱電偶 (CT) は極端な環境に適していますが,頑丈な隔離が必要です.
- 高温電気断熱器の製造は大きな課題です.
研究 の 目的:
- コアシアル熱電偶の自己修復性を持つ新しい複合電気隔離層を設計し製造する.
- 複合層の高温保温性能を評価する.
- 極限条件下でこの新しい絶縁を使用するK型同軸熱電偶の精度と応答時間を評価する.
主な方法:
- 松の木の自己治癒メカニズムに触発された 複合電気隔離層が設計されました
- 複合層はdipコーティングを使用してK型同軸熱電偶に適用されました.
- 改造された熱電偶は,シミュレートされた極端な環境における温度精度,ドリフト,ヒステリシス,応答時間,熱流量測定能力の厳密なテストを受けました.
主要な成果:
- 複合材料の保温は高温性能で,保温抵抗は1200°Cで14.5kΩであった.
- 温度測定では1.72%の精度 (200~1200°C),ドリフト<0.474%/h,ヒステレス<0.246%が1200°Cで示された.
- 熱流量試験では,測定可能な範囲は0~41.32MW/m2で,精度<6.511%で,応答時間は1.08ms (温度) と7.6ms (熱流量) であった.
結論:
- セルフヒーリング複合材料の断熱は,極端な熱環境における同軸熱電偶の耐久性と信頼性を大幅に高めます.
- 開発されたK型同軸熱電偶は,高度な性能を示し,航空宇宙アプリケーションの厳しい要求を満たしています.
- このイノベーションは,高度な熱管理と航空宇宙エンジンと超音速車両のモニタリングのための有望なソリューションを提供します.
さらに関連する動画
関連する概念動画
Insulation Coordination
227
Insulation coordination is the process of matching electric equipment's insulation strength with protective device characteristics to protect the equipment against expected overvoltages. This selection is based on engineering judgment and cost. Equipment can generally withstand short-duration high transient overvoltages, but repeated tests with identical waveforms can yield inconsistent results. As a result, standard impulse voltage waveforms are used for testing, defined by specific times...
227
Dielectric Polarization in a Capacitor
5.0K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
5.0K
Energy Stored In A Coaxial Cable
1.7K
A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic...
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic...
1.7K
Capacitor With A Dielectric
4.1K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
4.1K
Electrostatic Boundary Conditions in Dielectrics
1.4K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
1.4K
Line Protection with Impedance Relays
134
Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
Under normal conditions, low load currents keep the measured...
Under normal conditions, low load currents keep the measured...
134


